Average MCQ Questions & Answers

Average MCQs : This section focuses on the "Average". These Multiple Choice Questions (MCQs) should be practiced to improve the Average skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 overs to reach the target of 282 runs?

A. 6.25

B. 6.5

C. 6.75

D. 7

Question 2

A family consists of two grandparents, two parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family?

A. 28(4/7) years

B. 31(5/7) years

C. 32(1/7) years

D. None of these

Question 3

A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?

A. Rs. 4991

B. Rs. 5991

C. Rs. 6001

D. Rs. 6991

Question 4

The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

A. 0

B. 1

C. 10

D. 19

Question 5

The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

A. 76 kg

B. 76.5 kg

C. 85 kg

D. Data inadequate

Question 6

The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?

A. 23 years

B. 24 years

C. 25 years

D. Data inadequate

Question 7

The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is Rs. 6250 and the average monthly income of P and R is Rs. 5200. The monthly income of P is:

A. 3500

B. 4000

C. 4050

D. 5000

Question 8

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is:

A. 35 years

B. 40 years

C. 50 years

D. None of these

Question 9

A car owner buys petrol at Rs.7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year?

A. Rs. 7.98

B. Rs. 8

C. Rs. 8.50

D. Rs. 9

Question 10

In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother doest not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Arun?

A. 67 kg.

B. 68 kg.

C. 69 kg.

D. Data inadequate

Question 11

The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is:

A. 17 kg

B. 20 kg

C. 26 kg

D. 31 kg

Question 12

The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.

A. 47.55 kg

B. 48 kg

C. 48.55 kg

D. 49.25 kg

Question 13

A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:

A. 250

B. 276

C. 280

D. 285

Question 14

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is:

A. 53.33

B. 54.68

C. 55

D. None of these

Question 15

A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half (1/2). The number of pupils in the class is:

A. 10

B. 20

C. 40

D. 73

Question 16

The average age of P, Q, R and S is 30 years. How old is R? I. The sum of ages of P and R is 60 years. II. S is 10 years younger than R.

A. I alone sufficient while II alone not sufficient to answer

B. II alone sufficient while I alone not sufficient to answer

C. Either I or II alone sufficient to answer

D. Both I and II are not sufficient to answer

Question 17

How many candidates were interviewed everyday by the panel A out of the three panels A, B and C? I. The three panels on average interview 15 candidates every day. II. Out of a total of 45 candidates interviewed everyday by the three panels, the number of candidates interviewed by panel A is more by 2 than the candidates interviewed by panel c and is more by 1 than the candidates interviewed by panel B.

A. I alone sufficient while II alone not sufficient to answer

B. II alone sufficient while I alone not sufficient to answer

C. Either I or II alone sufficient to answer

D. Both I and II are not sufficient to answer

Question 18

What is the average age of children in the class? I. The age of the teacher is as many years as the number of children. II. Average age is increased by 1 year if the teacher's age is also included.

A. I alone sufficient while II alone not sufficient to answer

B. II alone sufficient while I alone not sufficient to answer

C. Either I or II alone sufficient to answer

D. Both I and II are not sufficient to answer

Question 19

How many marks did Tarun secure in English? I. The average mark obtained by Tarun in four subjects including English is 60. II. The total marks obtained by him in English and Mathematics together are 170. III. The total marks obtained by him in Mathematics and Science together are 180.

A. I and II only

B. II and III only

C. All I, II and III

D. None of these

Question 20

In a cricket team, the average age of eleven players in 28 years. What is the age of the captain? I. The captain is eleven years older than the youngest player. II. The average age of 10 players, other than the captain is 27.3 years. III. Leaving aside the captain and the youngest player, the average ages of three groups of three players each are 25 years, 28 years and 30 years respectively.

A. I and II only

B. II and III only

C. All I, II and III

D. II only or I and III only

Question 21

10 years ago, the average age of a family of 4 members was 24 years. Two children having been born (with age diference of 2 years), the present average age of the family is the same. The present age of the youngest child is :

A. 1

B. 2

C. 3

D. 4

Question 22

12 boys decided to constribute Rs. 750 each to an Orphange. Suddenly few of them boys dropped out and consequently the rest had to pay Rs. 150 more. Then the number of boys who dropped out?

A. 4

B. 6

C. 2

D. 3

Question 23

123 typists typeed 984 papers in 1/15 hour. The number of papers typed for minute by a average typist is:

A. 1

B. 2

C. 3

D. 5

Question 24

16 children are to be divided into two groups A and B of 10 and 6 children. The average percent marks obtained by the children of group A is 75 and the average percent marks of all the 16 children is 76. What is the average percent marks of children of group B ?

A. 233/3

B. 243/4

C. 254/5

D. 345/7

Question 25

19 friends went to a restaurant for a combined weekend dinner party. 13 of them spent Rs. 79 each on their dinner and the rest spent Rs. 4 more than the average expenditure of all the 19. What was the total money spent by them?

A. Rs. 1398.96

B. Rs. 1457.09

C. Rs. 1662.35

D. Rs. 1536.07

Question 26

19 personswentto a hotel for a combineddinner party. 13 of them spent Rs 79 each on their dinner and the rest spent Rs 4 more than the average expenditure of all the 19. What was the total money spent by them?

A. 1628.4

B. 1534

C. 1492

D. None of these

Question 27

20 men went to a restaurant. Ninteen of them paid Rs.70 each and the twentieth man paid Rs.90.25 more than the average of all the 20 men. What is the total bill ?

A. Rs. 1495

B. Rs. 548

C. Rs. 850

D. Rs. 1750

Question 28

20 pens and 46 pencils were purchased for Rs. 235. If the average price of a pencil is Rs. 2.50 then calculate the average price (in Rs.) of a pen.

A. 6

B. 4

C. 8

D. 12

Question 29

24 students collected money for donation. The average contribution was Rs.50. Later on, their teacher also contributed some money.Now the average contribution is Rs.56. The teacher’s contribution is:

A. ₹56

B. ₹200

C. ₹106

D. ₹194

Question 30

3 numbers whose average is 112, the first number is 1/6th the sum of other 2. What is the first number?

A. 45

B. 30

C. 15

D. 48

Question 31

8 years ago there were 5 members in the Arthur's family and then the average age of the family was 36 years. Mean while Arthur got married and gave birth to a child. Still the average age of his family is same now. What is the age of his wife at the time of his child's birth was.If the difference between the age of her child and herself was 26 years.

A. 25 years

B. 26 years

C. 20 years

D. can't be determined

Question 32

A batsman has a certain average of runs for 12 innings. In the 13th inning he scores 96 runs thereby increasing his average by 5 runs. What will be his average after 13th inning?

A. 28

B. 32

C. 36

D. 42

Question 33

A batsman in his 17th innings makes a score of 85 and their by increasing his average by 3. What is his average after the 17th innings ?

A. 34

B. 36

C. 35

D. 37

Question 34

A batsman makes 100 runs in the 25th match of his career. His average runs per match increases by 1.4. Find his average before the 25th match.

A. 65

B. 55

C. 75

D. 45

Question 35

A batsman makes a score of 111 runs in the 10th match and thus increases his average runs per match by 5. What will be his average after the 10th match?

A. 66

B. 61

C. 62

D. 64

Question 36

A batsman makes a score of 81 runs in the 16th match and thus increases his average runs per match by 3. What is his average after the 16th match?

A. 35

B. 34

C. 33

D. 36

Question 37

A batsman makes a score of 95 runs in the 13th match and thus increases his average runs per match by 4. What is his average after the 13th match?

A. 47

B. 43

C. 45

D. 49

Question 38

A batsman scores 26 runs and increases his average from 14 to 15. Find the runs to be made if he wants top increasing the average to 19 in the same match ?

A. 74

B. 79

C. 72

D. 60

Question 39

A batsman scores 87 runs in the 21st match of his career. His average runs per match increases by 2. What was his average before the 21st match.

A. 45

B. 46

C. 44

D. 43

Question 40

A batsman scores 98 runs in the 17th match of his career. His average runs per match increased by 2.5. What is his average before the 17th match?

A. 58

B. 60.5

C. 63

D. 55.5

Question 41

A boy buys 5 pencils at Rs 3 each, 3 erasers at Rs 2 each and 3 sharpeners at Rs 5 each. What is the average expenditure (in Rs) per article?

A. 3.27

B. 3.5

C. 4

D. 5

Question 42

A boy spends Rs 20 to purchase toffees at Rs 1 each. Next day, he purchased some toffees for Rs 40 with a discount of 50 paise per toffee. What is the average price per toffee (in paise)?

A. 45

B. 60

C. 40

D. 55

Question 43

A canteen requires 56 kgs of rice for seven days . The quantity of rice required for the months of April and May together is

A. 468 kg

B. 488 kg

C. 498 kg

D. 508 kg

Question 44

A car owner buys petrol at Rs 7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year ?

A. 6.23

B. 7.98

C. 8.97

D. 9.89

Question 45

A cicketer bas a certain average for 10 innings, In the eleventh inning, he scorod 108 runs, thereby increasing his average by 6 runs. His new average is :

A. 44 runs

B. 46 runs

C. 48 runs

D. 49 runs

Question 46

A factory buys 10 machines. 1 MachineA, 4 MachineB and rest MachineC. Prices of the machines are Rs 90000, Rs 40000 and Rs 40000 respectively. Calculate the average cost of these machines?

A. 56666.6

B. 68333.3

C. 45000

D. 43500

Question 47

A factory buys 10 machines. 2 MachineA, 3 MachineB and rest MachineC. Prices of the machines are Rs 95000, Rs 60000 and Rs 50000 respectively. What is the average cost of these machines?

A. 62000

B. 68333

C. 74666

D. 60500

Question 48

A factory buys 7 machines. 2 Machine A, 2 Machine B and rest Machine C. Prices of the machines are Rs 95000, Rs 75000 and Rs 43000 respectively. Calculate the average cost of these machines?

A. 71000

B. 67000

C. 75000

D. 65500

Question 49

A factory buys 7 machines. 2 MachineA, 4 MachineB and rest MachineC. Prices of the machines are Rs 56000, Rs 45000 and Rs 30000 respectively. Calculate the average cost of these machines.

A. 46000

B. 43666.66

C. 41333.33

D. 44500

Question 50

A factory buys 8 machines. 3 MachineA, 4 MachineB and rest MachineC. Prices of the machines are Rs 45000, Rs 25000 and Rs 35000 respectively. Calculate the average cost (in Rs) of these machines?

A. 33750

B. 35000

C. 36250

D. 32250

Question 51

A family consists of grandparents, parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family ?

A. 31( 5/7)

B. 32 (6/7)

C. 34(4/7)

D. 35(4/9)

Question 52

A grocer has a sale of Rs 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs, 6500 ?

A. 4991

B. 5467

C. 5987

D. 6453

Question 53

A group of boys has an average weight of 36 kg. One boy weighing 42 kg leaves the group and another boy weighing 30 kg joins the group. If the average now becomes 35.7 kg, then how many boys are there in the group?

A. 30

B. 32

C. 40

D. 56

Question 54

A librarian purchased 60 story books for his library. But he found that he could get 4 extra books by spending Rs 336 more and then the overall average price per book would be reduced by Re 1. The previous average price of each book was

A. Rs 84

B. Rs 83

C. Rs 68

D. Rs 100

Question 55

A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is :

A. 285

B. 290

C. 297

D. 305

Question 56

A line cuts the xaxis at the point (3,0) and the yaxis at the point (0,6). What is the equation of the line?

A. x = 2y + 6

B. y = 2x - 6

C. x = 2y - 6

D. y = 2x + 6

Question 57

A man buys 7 shirts at Rs 300 each, 2 trousers at Rs 450 each and 1 pair of shoes at Rs 500 each. What is the average expenditure (in Rs) per article?

A. 210

B. 250

C. 320

D. 350

Question 58

A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/hr. His average speed for the whole journey in km/hr is :

A. 35

B. 36

C. 37.5

D. 38.2

Question 59

A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half. The number of pupils in the class is :

A. 45

B. 40

C. 39

D. 37

Question 60

A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found the mean to be 12. What should be the number in place of x ?

A. 6

B. 7

C. 8

D. 9

Question 61

A student, by mistake, wrote 64 in place of 46 as a number at the time of finding the average of 10 given numbers & got the average as 50. The correct average of the numbers is

A. 48.2

B. 48

C. 48.1

D. 49

Question 62

A student's average marks in five subjects is 82. If the average marks of first two subject is 86.5 and the average marks of last two subjects is 84. Find the marks of third subject?

A. 69

B. 67

C. 71

D. 73

Question 63

A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the average score for the team would have been 84. The number of points the team scored was

A. 672

B. 665

C. 645

D. 588

Question 64

A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the average score for the team would have been 84. The number of points, the team scored was :

A. 665

B. 657

C. 658

D. 678

Question 65

a, b and c are 3 values, such that a + b = 5, b + c = 7.5 and c + a = 8.5. What will be the average of these values?

A. 1.5

B. 3

C. 3.5

D. 4.5

Question 66

After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. The difference between the ages of the replaced and the new members?

A. 16 years

B. 15 years

C. 14 years

D. 13 years

Question 67

After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the ages of the replaced and the new member ?

A. 12

B. 13

C. 14

D. 15

Question 68

Amithab's average expenditure for the January to June is Rs. 4200 and he spends Rs.1200 in January and Rs.1500 in july.The average expenditure for the months of febraury to July is:

A. Rs. 4250

B. Rs. 4520

C. Rs. 4060

D. None of these

Question 69

Among four students sitting in a row, average age of last three students is 20 years and the average age of first three students is 21 years. If the age of first student is 26 years, then what is the age (in years) of the last student?

A. 23

B. 37

C. 24

D. 29

Question 70

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 198, then what is the difference between the first and the third number?

A. 216

B. 297

C. 661

D. 431

Question 71

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 396, then what is the difference between the first and the third number?

A. 594

B. 448

C. 432

D. 453

Question 72

Among three numbers, the first is twice the second and thrice the third, If the average of three numbers is 517, then what is the difference between the first and the third number?

A. 564

B. 759

C. 485

D. 799

Question 73

An army of 12000 consists of Europeans and Indians. The average height of a European is 5ft 10 inches and that of an Indian is 5ft 9 inches and that of the whole army is 5ft 9 3/4 inches. Then the number of Indians in the army is ?

A. 3000

B. 4000

C. 5500

D. 2700

Question 74

An engineering student has to secure 25% marks to pass. He gets 45 and fails by 45 marks. Find the maximum marks.

A. 385 marks

B. 410 marks

C. 435 marks

D. 360 marks

Question 75

An engineering student has to secure 45% marks to pass. He gets 54 and fails by 36 marks. Find the maximum marks.

A. 200 marks

B. 225 marks

C. 250 marks

D. 275 marks

Question 76

An oil refinery buys oil at Rs 3600 per barrel. There is 10% wastage. If the refinery wants to earn 5% profit then at what price should it sell including 8% tax on selling price? (in Rs per barrel)

A. 3674

B. 3711

C. 4219

D. 4536

Question 77

Average age of 20 students is 21 years. 2 students leave the group and 1 new student joins the group. The average now becomes 20 years. If age of one of the student who left the group is 26 years and the one who joined is 20 years, then what is the age (in years) of the other student who left the group?

A. 20

B. 14

C. 22

D. 16

Question 78

Average age of a team having 12 players is 23 years. If the age of the coach is also included, then the average age increases by 2 years. What is the age (inyears) of the coach?

A. 41

B. 47

C. 49

D. 51

Question 79

Average of 11 numbers is 7. If every number is doubled, then what will be the new average of the numbers?

A. 3.5

B. 7

C. 10.5

D. 14

Question 80

Average of 14 numbers is 32. If the average of last 5 numbers is 26, then what is the average of the remaining numbers?

A. 35.33

B. 41.33

C. 27.5

D. 44.5

Question 81

Average of 31 numbers is 19. If the average of first 8 numbers is 24, then what is the average of the remaining numbers?

A. 17.26

B. 23.25

C. 26.2

D. 25.45

Question 82

Average of all even numbers between 104 and 148 is __________.

A. 128

B. 130

C. 124

D. 126

Question 83

Average of all even numbers between 222 and 250 is __________.

A. 234

B. 232

C. 236

D. 230

Question 84

Due to a price hike of 20% , 4 kg less sugar is available for Rs. 120 . What is the initial price per kg of sugar ?

A. Rs. 5 Kg

B. Rs. 4 Kg

C. Rs. 6 Kg

D. Rs. 5.5 Kg

Question 85

Each member of a club contributes as much rupees and as much paise as the number of members of the club. If the total contribution is Rs. 2525, then the number of members of the club is

A. 60

B. 45

C. 55

D. 50

Question 86

Find the average of all prime numbers from 1 to 50.

A. 21.867

B. 22.857

C. 23.887

D. 24.867

Question 87

Find the average of first 50 natural numbers?

A. 25

B. 25.5

C. 26

D. 26.5

Question 88

Find the mean and mode of the numbers 1, 9, 5, 4, 2, 1, 9, 9, 2, 1, 9, 1, 2, 1?

A. 4 & 9

B. 5 & 1

C. 4 & 1

D. 5 & 9

Question 89

Find the mean value of 2, 3, 3, 4, 6, 7

A. 4.17

B. 4.15

C. 4.13

D. 4.7

Question 90

Find the median of the data set: 1.9,8.4,3.6,5.8

A. 4.9

B. 4.8

C. 5.2

D. 5.6

Question 91

Find the value of '?, if the mean of the data set 18, 16, 22, 13, ? = 16.

A. 9

B. 11

C. 10

D. 12

Question 92

Five boxes of bananas sell for Rs. 30. how many boxes can you buy for Rs.9?

A. 2

B. 1.5

C. 1.25

D. 2.5

Question 93

For the data given below. find the sum of mode. median and mean.6, 3, 8, 4, 3, 11, 7, 4, 5, 4.

A. 13.5

B. 13

C. 14

D. 14.5

Question 94

Four numbers A, B, C and D are such that their overall average is 16. The average of A and B is 9.5. The average of C and D is

A. 22.5

B. 23

C. 21.5

D. 25.5

Question 95

How many window coverings are necessary to span 50 windows, if each window covering is 15 windows long?

A. 4

B. 15

C. 3

D. 50

Question 96

Ian has 14 boxes of paper and divides them evenly between 4 coworkers. How many whole boxes did each coworker get?

A. 2

B. 2.5

C. 3

D. 3.5

Question 97

If a certain amount is fully distributed among A, B & C in such a way that A receives 1/2 of the amount, B receives 1/3 of the amount and C receives ₹ 1200, then how much money would A receive

A. 4000

B. 1600

C. 3600

D. 1800

Question 98

If the arithmetic mean of 10 number is increased by 2,find the mean of the new set of number

A. 28

B. 34

C. 40

D. 37

Question 99

If the arithmetic mean of seventy-five numbers is calculated, it is 35. if each number is increased by 5, then mean of new numbers is :

A. 30

B. 40

C. 50

D. 60

Question 100

If the average age of 20 students in Class-I is 10 years and average age of 25 students in Class II is 12 years, find the average age (in years) of all students.

A. 11

B. 11.111

C. 10.5

D. 10.85

Question 101

If the average height of boys in a hall is 180 cm and that of girls is 150 cm. If the average height of the gathering is 165 cm, then find the number of girls present in the hall if the number of boys present in the hall are 78 ?

A. 56

B. 64

C. 87

D. 78

Question 102

If the mean of a, b, c is M and ab + bc + ca = 0, then the mean of a2+b2+c23 is :

A. M

B. 3 M^2

C. 2 (M/3)

D. M^2

Question 103

In a cinema hall for the matinee show which started at 2.30 pm and ended at 5.30 pm the vehicle parking lot had only three wheelers (auto rickshaws) and four wheelers. Today the wheels of the vehicles parked was counted and found to be 240. What could be the number of three wheelers parked therein ?

A. 48

B. 41

C. 45

D. 43

Question 104

In a class of 100 students, the average weight is 30 kg. If the average weight of the girls is 24 kg and that of the boys is 32 kg, then what is the number of girls in the class?

A. 25

B. 26

C. 27

D. 28

Question 105

In a class of 39 students there are 26 girls. The average weight of these girls is 42 Kgs and average weight of the full class is 48 kgs. What is the average weight (in kgs) of the boys of the class?

A. 54

B. 66

C. 60

D. 62

Question 106

In a class of 39 students there are 36 girls. The average weight of these girls is 38 Kg and average weight of the full class is 40 kgs. What is the average weight of the boys of the class?

A. 42

B. 64

C. 20

D. 62

Question 107

In a class of 50 students there are 22 girls who scored an average of 35 marks in the test. What is the average marks of the boys if the class average is 42 marks?

A. 50

B. 52.5

C. 47.5

D. 55

Question 108

In a class of 50 students there are 27 boys. The average weight of these boys is 72 Kg and average weight of the full class is 55.44 kgs. What is the average weight (in kgs) of the girls of the class?

A. 42

B. 48

C. 30

D. 36

Question 109

In a class of 50 students there are 27 girls. The average weight of these girls is 45 kg and average weight of the full class is 49.6 kgs. What is the average weight of the boys of the class?

A. 55

B. 54.2

C. 53.4

D. 53

Question 110

In a class of 55 students there are 34 girls. The average weight of these girls is 51 Kg and average weight of the full class is 55.2 kgs. What is the average weight of the boys of the class?

A. 62

B. 59.4

C. 56.8

D. 60

Question 111

In a class of 56 students there are 28 girls. The average weight of these girls is 46 kg and average weight of the full class is 51 kgs. What is the average weight of the boys of the class?

A. 55

B. 56

C. 53

D. 54

Question 112

In a class of 60 students there are 20 girls who scored an average of 40 marks in the test, what is the average marks of the boys if the class average is 60 marks?

A. 60

B. 70

C. 50

D. None of the above

Question 113

In a class of 60 students there are 30 girls. The average weight of these girls is 58 Kg and average weight of the full class is 63 kgs. What is the average weight of the boys of the class?

A. 67

B. 66

C. 68

D. 65

Question 114

In a class of 60 students there are 33 girls. The average weight of these girls is 62 Kg and average weight of the full class is 66.5 kg. What is the average weight of the boys of the class?

A. 72 kg

B. 71 kg

C. 70 kg

D. 73 kg

Question 115

In a class of 65 students there are 39 girls. The average weight of these girls is 60 Kg and average weight of the full class is 64 kgs. What is the average weight of the boys of the class?

A. 69

B. 66

C. 68

D. 70

Question 116

In a class of 66 students there are 33 girls. The average weight of these girls is 61 Kg and average weight of the full class is 66 kgs. What is the average weight of the boys of the class?

A. 72

B. 73

C. 69

D. 71

Question 117

In a class of 78 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course?

A. 6

B. 12

C. 24

D. 18

Question 118

In a class there were 28 boys and some girls. In a test the mean score obtained by the boys was 12.5 while that obtained by the girls was 14.5. If the overall average was 13.1, what was the total number of students in the class?

A. 42

B. 44

C. 40

D. 38

Question 119

In a class when a test is conducted, mean of 25 students marks is 60 if mean of first 13 students marks is 70 and mean of last 13 students marks is 50 find the marks of the middle student when arranged in the ascending order.

A. 70

B. 40

C. 50

D. 60

Question 120

In a class, there were 9 boys and some girls. In a test the mean score obtained by the boys was 12 while that obtained by the girls was 14. If the overall average was 13.1, what was the total number of students in the calss?

A. 21

B. 20

C. 22

D. 19

Question 121

In a marriage party 32% are women, 54% are men and there are 196 children. How many men are there in the marriage party?

A. 756

B. 448

C. 332

D. 324

Question 122

In a match of 50 overs, team A’s average runs for first thirty overs was 4.5 runs/over while for the remaining 20 overs the average was 5.5 runs/over. Team B chased the target and lost by 10 runs. Find the average runs per over scored by team B. (team B played all the 50 overs).

A. 4.4

B. 5.2

C. 4.7

D. 4.6

Question 123

In a match, average of runs scored by 7 players is 53. If the runs scored by 6 players are 121, 40, 26, 56, 37 and 48, then how many runs did the 7th player scored?

A. 26

B. 37

C. 43

D. 48

Question 124

In a mens hostel, there were 95 students. To accommodate 30 more students the average is decreased by rupees 5. But total expenditure increased by Rs.500. Find the total expenditure of the hostel now ?

A. Rs. 4680

B. Rs. 4420

C. Rs. 4960

D. Rs. 5480

Question 125

In a mixture of three varities of oils , the ratio of their weight is 4 : 5 : 8. If 5 kg of oils of the first variety, 10 kg of the second variety and some quantity of oils of the third variety are added to the mixture, the ratio of the weights of three varieties of oils becomes as 5 : 7 : 9 in the final mixture, find the quantity of third variety of oil was ?

A. 15 kg

B. 25 kg

C. 35 kg

D. 45 kg

Question 126

In a one day match of 50 overs in an innings the team A had a run rate of 5.3 runs per over. Team B is playing and 5 overs are left and the required run rate to tie the match is 7.2 per over to match the score of Team A. What is team B's score?

A. 265

B. 238

C. 254

D. 229

Question 127

In a one day match of 50 overs in an innings the Team A had a run rate of 6.1 runs per over. Team B is playing and 10 overs are left and the required run rate to tie the match is 6.5 per over. What is Team B's score now?

A. 235

B. 230

C. 240

D. 225

Question 128

In a particular week the average number of people who visited the Park is 40. If we exclude the holidays then the average is increased by 16. Further if we exclude also the day on which the maximum number of 112 people visited the Park, then the average becomes 42. The number of holidays in the week is

A. 1

B. 2

C. 3

D. 4

Question 129

In a school , 391 boys and 323 girls have been divided into the largest possible equal classes , so that each class of boys numbers the same as each class of girls . What is the number of classes ?

A. 23

B. 19

C. 44

D. 17

Question 130

In a village the average age of n people is 42 years. But after the verification it was found that the age of a person had been considered 20 years less than the actual age, so the new average, after the correction,increased by 1. The value of n is :

A. 21

B. 20

C. 22

D. None of these

Question 131

In an exam, the avarage marks obtained by John in English, Maths, Hindi and Drawing were 50. His average marks in Maths, Science, Social Studies and Craft were 70. If the average marks in all seven subjects is 58, his score in maths was

A. 50

B. 52

C. 60

D. 74

Question 132

In an examination, a pupil's average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination ?

A. 8

B. 9

C. 10

D. 11

Question 133

In an NGO the daily average wages of 20 illiterate employees is decreased from Rs.25 to Rs.10, thus the average salary of all the literate and illiterate employees is decreased Rs.10 per day. The No. of educated employees working in the NGO is :

A. 15

B. 20

C. 10

D. Data Insufficient

Question 134

In Arun's opinion, his weight is greater than 65 kg but leas than 72 kg. His brother does not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all of them are correct in their estimation, what is the average of diferent probable weights of Arun ?

A. 55.5 kg

B. 66.5 kg

C. 77.5 kg

D. 88.5 kg

Question 135

In the first 32 overs of a cricket match, the run rate was 7.2 runs/over. What is the required run rate in the remaining 18 overs to reach the target of 297 runs?

A. 4.3

B. 4.9

C. 3.1

D. 3.7

Question 136

In the first 36 overs of a cricket match, the run rate was 4.3 runs/over. Calculate the required run rate in the remaining 14 overs to reach the target of 271 runs?

A. 8.9

B. 9.5

C. 8.3

D. 7.7

Question 137

In the first 38 overs of a cricket match, the run rate was 4.5 runs/over. Calculate the required run rate in the remaining 12 overs to reach the target of 288 runs?

A. 10.35

B. 10.95

C. 9.75

D. 9.15

Question 138

In the first 39 overs of a cricket match, the run rate was 4.6 runs/over. Calculate the required run rate in the remaining 11 overs to reach the target of 252 runs?

A. 7.2

B. 5.7

C. 6.3

D. 6.6

Question 139

In the first 40 overs of a 50 over innings, the run rate was 4.8 runs/over. What is the required run rate in the remaining 10 overs to reach the target of 241 runs?

A. 6.7

B. 6.5

C. 6.3

D. 4.9

Question 140

In the first 43 overs of a cricket match, the run rate was 5 runs/over. Calculate the required run rate in the remaining 7 overs to reach the target of 285 runs?

A. 10.6

B. 11.2

C. 10

D. 9.4

Question 141

In the first 45 overs of a 50 over innings, the run rate was 5.8 runs per over. What is the required run rate in the remaining overs to reach the target of 295 runs?

A. 6.9

B. 6.8

C. 6.7

D. 6.6

Question 142

It costs Rs. p each to send the first thousand messsages and Rs. q to send each subsequent one . If r is greater than 1,000, how many Rupees will it cost to send r messages ?

A. 1000 (r - p) + pq

B. 1000 p + qr

C. 1000 (r - q) + pr

D. 1000(p - q) + qr

Question 143

Mahesh buys 3 shirts at an average price of Rs 1250. If he buys 2 more shirts at an average price of Rs 1450 what will be the average price (in Rs) of all the 5 shirts he buys?

A. 1370

B. 1330

C. 1310

D. 1390

Question 144

Navaneet has thrice the money Poonam has and Poonam has 25% more money than Hebah. If the average money of the three is Rs. 350, What is the amount that Navaneet has ?

A. Rs. 175

B. Rs. 220.75

C. Rs. 218.55

D. Rs. 656.25

Question 145

Nine students of a class contribute a certain sum of money. Seven of them gave Rs. 50 each and the other two gave respectively Rs. 50 and Rs. 90 more than the others. The average contribution of the class of 9 students is

A. Rs. 70

B. Rs. 50

C. Rs. 100

D. Rs. 120

Question 146

Of the 3 numbers whose average is 112, the first is 3/13 times the sum of other 2. The first number is _____.

A. 63

B. 95

C. 42

D. 126

Question 147

Of the 3 numbers whose average is 40, the first is 1/3 rd the sum of other 2. What is the first number?

A. 20

B. 50

C. 25

D. 30

Question 148

Of the 5 numbers whose average is 72, the first is 1/8 times the sum of other 4. The first number is _____.

A. 60

B. 26

C. 40

D. 80

Question 149

Of the 5 subjects, the average marks of Rakesh in first 3 Subjects was 79 and the average marks in the last 3 subjects was 86. If his marks in the third subject was 80, then what was his average marks in all the 5 subjects?

A. 81

B. 82

C. 83

D. 85

Question 150

Of the four numbers whose average is 91, the first is 3/10 times the sum of other three. The first number is:

A. 126

B. 56

C. 168

D. 84

Question 151

Of the four numbers, whose average is 60, the first is one-fourth of the sum of the last three. The first number is :

A. 17

B. 29

C. 36

D. 48

Question 152

Of the three numbers, the average of the first number and the second number is 37 more than the average of second number and third number. What is the difference between the first and the third number?

A. 74

B. 73

C. 37

D. cannot be determined

Question 153

On 24th May 2008 the maximum temperature of Delhi, Kolkata and Mumbai were recorded as 35 deg C, 33 deg C and 34 deg C respectively. What was the maximum temperature of Chennai so that the average maximum temperature of those cities would be 35 deg?

A. 34 deg C

B. 35 deg C

C. 36 deg C

D. 38 deg C

Question 154

On a school’s Annual day sweets were to be equally distributed amongst 112 children. But on that particular day, 32 children were absent. Thus the remaining children got 6 extra sweets. How many sweets was each child originally supposed to get ?

A. 14

B. 16

C. 12

D. 15

Question 155

One diagonal of a rhombus is half the other. If the length of the side of the rhombus is 20 cm, what is the area of the rhombus?

A. 320 sq cm

B. 160 sq cm

C. 240 sq cm

D. 360 sq cm

Question 156

Out of 9 persons, 8 persons spent Rs. 30 each for their meals. The ninth one spent Rs. 20 more than the average expenditure of all the nine. The total money spent by all of them was :

A. Rs. 292.50

B. Rs. 297.50

C. Rs. 298

D. Rs. 298.50

Question 157

Out of the five integral numbers C is the average of A and D. B is greater than C and less than D.Also B is the average of A and E . The middle most number in the sequence

A. A

B. B

C. C

D. D

Question 158

Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56, what will be the sum of the highest number and the lowest number?

A. 120

B. 160

C. 80

D. 60

Question 159

P, Q, R, S, T and U are six consecutive odd numbers and their average is 52. What is the product of P and U ?

A. 2212

B. 2154

C. 2349

D. 2679

Question 160

Rita buys 5 sarees at an average cost of Rs 2250. If she buys three more sarees at an average cost of Rs 2750, what will be the average (in Rs) of all the sarees she buys?

A. 2437.5

B. 2500

C. 2450

D. 2332.5

Question 161

Samit was given some money to take care of his travel during a 6-day sales drive he had to undertake. However, he had to increase his stay by another 4 days and as a result his average daily travel allowance went down by Rs. 56. What was the amount that was sanctioned to him in the beginning?

A. Rs.336

B. Rs.560

C. Rs.840

D. Rs.420

Question 162

David obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics,Physics, Chemistry and Biology What are his average marks ?

A. 75

B. 68

C. 65

D. 60

Question 163

Sripad has scored average of 65 marks in three objects. In no subjects has he secured less than 58 marks. He has secured more marks in Maths than other two subjects. What could be his maximum score in Maths ?

A. 79

B. 77

C. 76

D. 73

Question 164

Sriram was conducting an experiment in which the average of 11 observations came to be 92, while the average of first five observations was 89, and that of the last five was 86. What was the measure of the 6th observation ?

A. 134

B. 137

C. 139

D. 141

Question 165

Starting with 8000 workers, the company increases the number of workers by 5%, 10% and 20% at the end of first, second and third year respectively. The number of workers in the fourth yearwas

A. 10188

B. 11088

C. 11008

D. 11808

Question 166

The average (arithmetic mean) amount of savings of ten students is Rs. 600. Three of the students have no savings at all and each of the others have at least Rs. 250 including Nihar, who has exactly Rs. 1300. The largest amount, in Rs., that any one student could have is

A. 3250

B. 3450

C. 3650

D. 3850

Question 167

The average age of 120 members of a society is 60.7 years. By addition of 30 new members, the average age becomes 56.3 years. What is the average age (in years) of newly joined members?

A. 36.5

B. 37.2

C. 38.3

D. 38.7

Question 168

The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years, The age of the 15th student is :

A. 11

B. 12

C. 13

D. 14

Question 169

The average age of 24 students is 12 years. It was observed that while calculating the average age, the age of a student was taken as 14 years instead of 8 years. What will be the correct average age (in years)?

A. 11.25

B. 11.5

C. 11.75

D. 12.25

Question 170

The average age of 36 students in a group is 14 years. When teacher's age is included to it, the average increases by one. What is the teacher's age in years ?

A. 35 years

B. 45 years

C. 51 years

D. 54 years

Question 171

The average age of 7 boys is increased by 1 year when one of tem whose age is replaced by a girl. What is the age of the girl ?

A. 33 yrs

B. 27 yrs

C. 21 yrs

D. 29 yrs

Question 172

The average age of 8 men is increased by years when two of them whose ages are 21 years and 23 years are replaced by two new men. The average age of the two new men is :

A. 20

B. 30

C. 40

D. 50

Question 173

The average age of 80 boys in a class is 15 years. The average age of a group of 15 boys in the class is 16 years and the average age of another 25 boys in the class is 14 years. What is the average age of the remaining boys in the class?

A. 15.25 years

B. 14 years

C. 14.75 years

D. Cannot be determined

Question 174

The average age of a class is 19 years. While the average age of girls is 18 and that of boys is 21. If the number of girls in the class is 16, Find the number of Boys in the class?

A. 12

B. 10

C. 8

D. 6

Question 175

The average age of a group of persons going for picnic is 16 years. Twenty new persons with an average age of 15 years join the group on the spot due to which their average age becomes 15.5 years. The number of persons initially going for picnic is :

A. 15

B. 20

C. 23

D. 24

Question 176

The average age of a husband and his wife was 23 years at the time of their marriage. After five years they have a one-year old child. The average age of the family now is :

A. 25

B. 23

C. 19

D. 18

Question 177

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is

A. 30

B. 40

C. 50

D. 60

Question 178

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years, The ratio of the number of boys to the number of girls in the class is :

A. 1 : 2

B. 2 : 3

C. 3 : 4

D. 4 : 5

Question 179

The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is :

A. 15

B. 20

C. 21

D. data inadequate

Question 180

The average age of the district level hockey team of eleven is 22 years.The average age gets increased by 1 year when the coach age is also included.what is the age of the coach ?

A. 33 yrs

B. 34 yrs

C. 35 yrs

D. 36 yrs

Question 181

The average ages of parents and two children are 30 years and 8 years respectively. The average age of the family is

A. 16 years

B. 19 years

C. 18 years

D. 17 years

Question 182

The average cost of 4 items in a shopping list is Rs 1,250. If one more item whose cost is Rs 2,000 is added to the list what will be the new average (inRs)?

A. 1100

B. 1500

C. 1400

D. 1250

Question 183

The average cost of 5 items in a shopping list is Rs 650. If one more item whose cost is Rs 1400 is added to the list what will be the new average (in Rs)?

A. 775

B. 875

C. 725

D. 825

Question 184

The average expenditure of the hotel when there are 10 guests is Rs. 60 per guests and the average expenditure is Rs.40 when there are 20 Guests. If it is known that there are some fixed expenses irrespective of the number of guests then the average expenditure per guest whe there are 40 guests in the hotel.

A. Rs. 30

B. Rs. 25

C. Rs. 20

D. can't be determined

Question 185

The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is:

A. 161

B. 162

C. 163

D. 164

Question 186

The average height of A, B and C is 148 cm. If the average height of A and B is 136 cm and that of B and C is 125 cm, then what is the height (in cm) of B?

A. 56

B. 78

C. 112

D. 130

Question 187

The average marks in science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average?

A. 68.5

B. 69

C. 69.5

D. 70

Question 188

The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85. The average marks of the remaining students is

A. 35

B. 45

C. 55

D. 65

Question 189

The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?

A. 10

B. 11

C. 8

D. 9

Question 190

The average marks obtained by Raghav in 12 tests is 24. Zubeida has maintained an average of 23 so far but has taken only 9 of the tests. If each test is out of 30, at least how much Zubeida score in any one of the remaining three tests to still have a chance to match Raghav's performance?

A. 21

B. 22

C. 20

D. 19

Question 191

The average marks of 10 students in an examination was 25. It was later found that the marks of one student had been wrongly entered as 34 instead of 43. What is the correct average?

A. 25.5

B. 24.1

C. 24.5

D. 25.9

Question 192

The average marks of 18 students in an examination was 60. It was later found that the marks of one student had been wrongly entered as 63 instead of 36. The correct average is:

A. 59

B. 59.5

C. 58

D. 58.5

Question 193

The average marks of 40 students in an examination was 25. It was later found that the marks of one student had been wrongly entered as 73 instead of 37. What is the value of correct average?

A. 24.3

B. 24.1

C. 24.5

D. 24.7

Question 194

The average marks of 40 students in an examination was 34. It was later found that the marks of one student had been wrongly entered as 62 instead of 26. what is the correct average?

A. 33.1

B. 33.3

C. 33.5

D. 33.7

Question 195

The average marks of 45 students is shown as 65. It includes a wrong entry of 84 marks instead of 48 marks. The correct average is:

A. 65.8 marks

B. 67.4 marks

C. 62.6 marks

D. 64.2 marks

Question 196

The average marks of 50 students in an examination was 65. It was later found that the marks of one student had been wrongly entered as 83 instead of 38. The correct average is?

A. 63.9

B. 64.5

C. 64.7

D. 64.1

Question 197

The average marks of 56 students is shown as 60. It includes a wrong entry of 92 marks instead of 29 marks. The correct average is _____ .

A. 58.875 marks

B. 61.125 marks

C. 63.375 marks

D. 56.625 marks

Question 198

The average marks of a student in 7 subjects is 85. His average marks in 6 subjects except English is 83. What is his marks in English ?

A. 97

B. 98

C. 92

D. 93

Question 199

The average monthly salary of 19 members of a group is Rs. 16000. If one more members whose monthly salary is Rs. 20000 has joined the group, then the average salary of the group is

A. Rs.18250

B. Rs.16200

C. Rs.18000

D. Rs.16250

Question 200

The average monthly salary of 20 employees in an organisation is Rs. 1500. If the manager's salary is added, then the average salary increases by Rs. 100. What is the manager's monthly salary ?

A. 3600

B. 3700

C. 3800

D. 3900

Question 201

The average monthly salary of 24 employees in an organisation is Rs. 1500. If the manager's salary is added, then the average salary increases by Rs. 400. What is the manager's monthly salary ?

A. Rs. 8840

B. Rs. 11,500

C. Rs. 12,800

D. Rs. 9450

Question 202

The average of 10 numbers is 30. If at the time of calculation one number was wrongly taken as 36 instead of 69, then what will be the correct average?

A. 33

B. 33.3

C. 36

D. 39

Question 203

The average of 10 numbers is X and one of the number is 38. If 38 is replaced with 19, then what will be the new average?

A. X– (1/2)

B. X – (1/19)

C. X – (19/10)

D. X – (19/9)

Question 204

The average of 100 items was found to be 30 . If at the time of calculation , two items were wrongly taken as 32 and 12 instead of 23 and 11 , then the correct average is

A. 29.8

B. 29

C. 29.9

D. 29.5

Question 205

The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is :

A. 10.5

B. 11.5

C. 12.5

D. 13.5

Question 206

The average of 12 numbers is 35. If four numbers 20, 27, 15 and 29 are removed then what will be the average of remaining numbers?

A. 41.125

B. 49.5

C. 52.5

D. 38.375

Question 207

The average of 15 numbers is 7. If the average of the first 8 numbers is 6.5 and the average of the last 8 numbers is 8.5 then middle number is

A. 10

B. 23

C. 13

D. 15

Question 208

The average of 19 consecutive even integers is 50. The highest of these integers is

A. 88

B. 68

C. 126

D. 100

Question 209

The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ?

A. 0

B. -1

C. 1

D. none of these

Question 210

The average of 21 numbers is 12. The average of the first 11 numbers is 9 and the average of the last 11 numbers is 15. What is the value of the middle number?

A. 10

B. 11

C. 12

D. 13

Question 211

The average of 26,29,n,35 and 43 lies between 25 and 35. If n is always an integer and greater than the average of the given integers then the value of n is :

A. 33

B. 34

C. 33

D. None of these

Question 212

The average of 41 consecutive odd numbers is 49. What is the largest number.

A. 89

B. 91

C. 93

D. 95

Question 213

The average of 44 consecutive odd numbers is 144.What is the largest number?

A. 189

B. 191

C. 187

D. 193

Question 214

The average of 5 consecutive numbers is 50%, then difference between 'product of largest and smallest number' with 'product of fourth and second number' is

A. 3

B. -3

C. 0

D. 10

Question 215

The average of 5 members of a family is 24 years. If the youngest member is 8 years old, then what was the average age (in years) of the family at the time of the birth of the youngest member?

A. 16

B. 20

C. 24

D. 30

Question 216

The average of 50 consecutive natural numbers is x. What will be the are average when the next four natural numbers are also included?

A. x + 1

B. x + 2

C. x + 4

D. x + (x/54)

Question 217

The average of 6 consecutive integers is 15/2. What is the average of last three integers?

A. 8

B. 9

C. 17/2

D. 7

Question 218

The average of 7 consecutive numbers is 20. The largest of these numbers is :

A. 21

B. 22

C. 23

D. 24

Question 219

The average of 7 numbers is 30. If the average of first three numbers is 25 and that of last three numbers is 35, then what is the fourth number?

A. 30

B. 35

C. 37.5

D. 40

Question 220

The average of 8 consecutive natural numbers is 38.5. What is the largest of these 8 numbers?

A. 41

B. 39

C. 42

D. 45

Question 221

The average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. The correct average of the observations is

A. 28

B. 42

C. 35

D. 45

Question 222

The average of a non-zero number and its square is 11 times the number. The number is ?

A. 22

B. 21

C. 11

D. 17

Question 223

The average of a,b,c is 20 and that of b,c,d is 25; if d=30, then the value of a is

A. 25

B. 45

C. 30

D. 15

Question 224

The average of any 5 consecutive odd natural numbers is k . If two more such numbers , just next to the previous 5 numbers are added , the new average becomes

A. 2(k+1)

B. 2k-3

C. 2k+1

D. k+2

Question 225

The average of five consecutive odd numbers is 61. What is the difference between the highest and lowest numbers :

A. 4

B. 8

C. 12

D. 16

Question 226

The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is :

A. 25

B. 35

C. 45

D. 55

Question 227

The average of four consecutive odd numbers is 64. What is the value of largest number?

A. 65

B. 69

C. 71

D. 67

Question 228

The average of fruits offered in a temple in a week was 75. The average of fruits offered in six days excluding Tuesday was 72. How many fruits were offered on Tuesday?

A. 90

B. 93

C. 72

D. 92

Question 229

The average of marks in 3 subjects is 224. The first subject marks is twice the second and the second subject marks is twice the third. Find the second subject marks ?

A. 384

B. 96

C. 192

D. 206

Question 230

The average of marks obtained by 100 candidates in a certain examination is 30. If the average marks of passed candidates is 35 and that of the failed candidates is 10, what is the number of candidates who passed the examination?

A. 60

B. 70

C. 80

D. 90

Question 231

The average of marks of 17 students in an examination was calculated as 71. But it was later found that the mark of one student had been wronglyentered as 65 instead of 56 and another as 24 instead of 50. The correct average is

A. 70

B. 71

C. 72

D. 73

Question 232

The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so as to increase his average of runs by 4 ?

A. 76

B. 79

C. 85

D. 87

Question 233

The average of runs scored by a cricketer in his 99 innings is 99. How many runs will he have to score in his 100th innings so that his average of runs in 100 innings may be 100?

A. 100

B. 99

C. 199

D. 101

Question 234

The average of six numbers is 3.95. The average of two of them is 3.4, while the average of the other two is 3.85. What is the average of the remaining two numbers ?

A. 3.6

B. 4.6

C. 6.5

D. 7.3

Question 235

The average of six numbers is x and the average of three of these is y. If the average of the remaining three is z, then :

A. x = y + z

B. 2x = y + z

C. 3x = 2y - 2z

D. none of these

Question 236

The average of the two-digit numbers, which remain the same when the dibits inter-change their positions, is :

A. 53

B. 54

C. 55

D. 56

Question 237

The average of three numbers is 40. First number is 4/3 of the third number. If third number is 20 less than second number, then what is the value of second number?

A. 60

B. 50

C. 10

D. 20

Question 238

The average of three numbers is 6. The average of the first two is 5 while the average of the last two is 8. The three numbers are:

A. 2, 6, 10

B. 3, 7, 8

C. 2, 8, 8

D. 2, 7, 9

Question 239

The average of X, Y, Z is 24. Also, X:Y = 2:3 and X+Y = 60, then find the value of (X-Z)?

A. 9

B. 10

C. 11

D. 12

Question 240

The average price of 10 books is Rs. 12 while the average price of 8 of these books is Rs. 11.75. Of the remaining two books, if the price of one book is 60% more than the price of the other, what ia the pice of each of these two books ?

A. 16,12

B. 10,16

C. 23,9

D. 8,7

Question 241

The average price of three items of furniture is Rs. 15000. If their prices are in the ratio 3:5:7, the price of the cheapest item is :

A. 6000

B. 7000

C. 8888

D. 9000

Question 242

The average revenues of 11 consecutive years of a company is Rs 69 lakhs. If the average of first 6 years is Rs 64 lakhs and that of last 6 years is Rs 76 lakhs, what is the revenue for the 6th year?

A. Rs 83 lakhs

B. Rs 79 lakhs

C. Rs 77 lakhs

D. Rs 81 lakhs

Question 243

The average revenues of 11 consecutive years of a company is Rs 77 lakhs. If the average of first 6 years is Rs 72 lakhs and that of last 6 years is Rs 84 lakhs, What is the revenue for the Sixth year.

A. Rs 91 lakhs

B. Rs 87 lakhs

C. Rs 85 lakhs

D. Rs 89 lakhs

Question 244

The average revenues of 13 consecutive years of a company is Rs 78 lakhs. If the average of first 7 years is Rs 73 lakhs and that of last 7 years is Rs 85 lakhs, what is the revenue for the 7th year?

A. Rs 94 lakhs

B. Rs 90 lakhs

C. Rs 88 lakhs

D. Rs 92 lakhs

Question 245

The average revenues of 13 consecutive years of a company is Rs 82 lakhs. If the average of first 7 years is Rs 77 lakhs and that of last 7 years is Rs 89 lakhs, find the revenue for the 7th year.

A. Rs 98 lakhs

B. Rs 96 lakhs

C. Rs 94 lakhs

D. Rs 92 lakhs

Question 246

The average revenues of 7 consecutive years of a company is Rs 71 lakhs. If the average of first 4 years is Rs 66 lakhs and that of last 4 years is Rs 78 lakhs. What is the revenue for the fourth year.

A. Rs 81 lakhs

B. Rs 77 lakhs

C. Rs 79 lakhs

D. Rs 75 lakhs

Question 247

The average revenues of 7 consecutive years of a company is Rs 75 lakhs. If the average of first 4 years is Rs 70 lakhs and that of last 4 years is Rs 82 lakhs, what will be the revenue for the 4th year.

A. Rs 85 lakhs

B. Rs 83 lakhs

C. Rs 81 lakhs

D. Rs 79 lakhs

Question 248

The average revenues of 7 consecutive years of a company is Rs 79 lakhs. If the average of first 4 years is Rs 74 lakhs and that of last 4 years is Rs 86 lakhs, what is the revenue for the 4th year?

A. Rs 87 lakhs

B. Rs 89 lakhs

C. Rs 85 lakhs

D. Rs 83 lakhs

Question 249

The average revenues of 7 consecutive years of a company is Rs 83 lakhs. If the average of first 4 years is Rs 78 lakhs and that of last 4 years is Rs 90 lakhs, find the revenue for the 4th year.

A. Rs 91 lakhs

B. Rs 93 lakhs

C. Rs 89 lakhs

D. Rs 87 lakhs

Question 250

The average revenues of 9 consecutive years of a company is Rs 65 lakhs. If the average of first 5 years is Rs 60 lakhs and that of last 5 years is Rs 72 lakhs, find the revenue for the 5th year.

A. Rs 77 lakhs

B. Rs 75 lakhs

C. Rs 73 lakhs

D. Rs 71 lakhs

Question 251

The average revenues of 9 consecutive years of a company is Rs 76 lakhs. If the average of first 5 years is Rs 71 lakhs and that of last 5 years is Rs 83 lakhs, find the revenue for the 5th year.

A. Rs 88 lakhs

B. Rs 84 lakhs

C. Rs 86 lakhs

D. Rs 82 lakhs

Question 252

The average revenues of 9 consecutive years of a company is Rs 80 lakhs. If the average of first 5 years is Rs 75 lakhs and that of last 5 years is Rs 87 lakhs, find the revenue for the 5th year.

A. Rs 90 lakhs

B. Rs 92 lakhs

C. Rs 88 lakhs

D. Rs 86 lakhs

Question 253

The average runs conceded by a bowler in 5 matches is 45 and 15.75 in other 4 matches. What is the average runs conceded by the bowler in 9 matches?

A. 15

B. 32

C. 35

D. 53.5

Question 254

The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is :

A. 20

B. 21

C. 23

D. 24

Question 255

The average salary of all workers in a workshop is Rs.12000. The average salary of 7 technicians is Rs.15000 and the average salary of the rest is Rs.9000. The total number of workers in the workshop is

A. 12

B. 13

C. 14

D. 15

Question 256

The average score of boys in an examination in a school is 81 and that of the girls is 83 and the average score of the school is 81.8. Then what will be ratio between the number of girls to the number of boys, in the examination?

A. 3:2

B. 2:3

C. 4:3

D. 3:4

Question 257

The average temperature for Monday, Tuesday, Wednesday and Thursday was 48 degrees and for Tuesday, Wednesday, Thursday and Friday was 46 degrees. If the temperature on Monday was 42 degrees. Find the temperature on Friday ?

A. 34

B. 36

C. 38

D. 40

Question 258

The average temperature for Monday, Tuesday, Wednesday and Thursday was 48° . The average temperature for Tuesday, Wednesday, Thursday and Friday was 52°, If the temperature on Monday was 42°, then the temperature on Friday was (in degrees)

A. 58

B. 56

C. 52

D. 50

Question 259

The average temperature of Monday ,Tuesday , Wednesday and Thursday is 60°, The average for Tuesday, Wednesday, Thursday and Friday is 63°; If the ratio of temperature for Monday and Friday is 21 : 25, then what is the temperature of Friday ?

A. 70°

B. 73°

C. 75°

D. 78°

Question 260

The average temperature of the town in the first four days of a month was 58 degrees. The average for the second, third, fourth and fifth days was 60 degrees. If the temperatures of the first and fifth days were in the ratio 7 : 8, then what is the temperature on the fifth day ?

A. 62 degrees

B. 64 degrees

C. 65 degrees

D. 66 degrees

Question 261

The average value of property of Mittal, Ambani and Singhania is Rs.11111 crore. The property of Singhania is as less than the property of Mittal is greater than the average property of both the Singhania and Mittal. The value of property of Ambani is :

A. Rs.111 crore

B. Rs. 1111 crore

C. Rs. 11111 crore

D. can't be determined

Question 262

The average weight of 10 parcels is 1.7 kg. Addition of another new parcel reduces the average weight by 60 gram. What is the weight , in kg, of the new parcel?

A. 1.04

B. 1.08

C. 1.4

D. 1.8

Question 263

The average weight of 100 students is 32 kg. The average weight of first 49 students is 30 kg and of last 50 students is 34 kg. What is the weight (in kg) of the 50th student?

A. 25

B. 30

C. 32

D. 33

Question 264

The average weight of 25 bags is 55 kg. The weight of one bag was misread as 65 instead of 56. Find the correct mean value.

A. 55.25

B. 55.36

C. 54.64

D. 55.65

Question 265

The average weight of 3 men A, B and C is 84 Kg. Another man D joins the group and the average now becomes 80 Kg. If another man E whose weight is 3 Kg more than that of D, replaces A then the average weight of B, C, D and E becomes 79 Kg. What is the weight of A?

A. 70 Kg

B. 72 Kg

C. 75 Kg

D. 80 Kg

Question 266

The average weight of 30 students in a class is 25 kgs. If the weight of the class teacher is added, the average weight increase by 2 kgs. The weight of the class teacher in kgs is

A. 86

B. 84

C. 81

D. 87

Question 267

The average weight of 35 apples is 50 grams. If some apples of weight 40 grams each were removed, then average weight becomes 57.5 grams. How many apples of weight 40 grams were removed?

A. 5

B. 10

C. 15

D. 20

Question 268

The average weight of 45 passengers in a bus is 52 kg. 5 of them whose average weight is 48 kg leave the bus and other 5 passengers whose average weight is 54 kg join the bus at the same stop. What is the new average weight of the bus?

A. 54.21 kgs

B. 51.07 kgs

C. 52.66 kgs

D. 53.45 kgs

Question 269

The average weight of 50 boys in a class is 45 Kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.

A. 50 Kg

B. 50.8 Kg

C. 49 Kg

D. 49.9 Kg

Question 270

The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?

A. 70 kg

B. 75 kg

C. 80 kg

D. 85 kg

Question 271

The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is :

A. 45 kg

B. 46 kg

C. 47 kg

D. 48 kg

Question 272

The average weight of a group of boys is 30 kg. After a boy of weight 35 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally ?

A. 6

B. 8

C. 4

D. 5

Question 273

The average weight of L, M and N is 93 kg. If the average weight of L and M be 89 kg and that of M and N be 96.5 kg, then the weight (in kg) of M is ________.

A. 92

B. 86

C. 101

D. 95

Question 274

The average weight of P, Q and R is 45 kg. If the average weight of P and Q be 36.5 kg and that of Q and R be 52 kg, then what is the weight (in kgs) of Q?

A. 42

B. 44

C. 46

D. 48

Question 275

The average weight of P, Q and R is 47 kg. If the average weight of P and Q be 32.5 kg and that of Q and R be 48.5 kg, then what is the weight of Q (in kgs)?

A. 25

B. 29

C. 21

D. 33

Question 276

The average weight of P, Q and R is 71 kg. If the average weight of P and Q be 66 kg and that of Q and R be 76.5 kg, then the weight (in kg) of Q is.

A. 60

B. 72

C. 81

D. 75

Question 277

The average weight of Shivshankar, Gopesh and Reena is 97 kg. If the average weight of Shivshankar and Gopesh is 93 kg and that of Gopesh and Reena is 82 kg, then the weight of Gopesh is

A. 72

B. 56

C. 59

D. 63

Question 278

The average weight of Shubha, Govinda and Reshma is 65 kg. If the average weight of Shubha and Govinda be 63 kg and that of Govinda and Reshma be 70 kg, then the weight of Govinda is

A. 41

B. 71

C. 88

D. 46

Question 279

The average weight of Somdev, Gurdeep and Ritu is 85 kg. If the average weight of Somdev and Gurdeep be 79 kg and that of Gurdeep and Ritu be 73 kg, then the weight of Gurdeep is

A. 78

B. 49

C. 72

D. 90

Question 280

The average weight of two players P and Q of a football team is 38 kg. The average weight of P, Q and their coach T is 49 kg. What is the weight (in kg) of coach?

A. 71

B. 46

C. 76

D. 91

Question 281

Seven friends spent Rs 14 each on a project and the eighth friend spent Rs 21 more than the average expenditure of all eight of them. What is the amount of total money (in Rs) spent by them?

A. 133

B. 136

C. 141

D. 155

Question 282

Seven years ago, the average age of A, B and C was 51 years. If A is 3 years older than B and B is 3 years older then C then the present ages of A, B and C are ( in year)

A. 61, 58 and 55

B. 54, 51, and 48

C. 55, 58, and 61

D. 48, 51 and 54

Question 283

The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is :

A. 49/7

B. 19/7

C. 50/7

D. 18/7

Question 284

The mean height of 25 boys in a class is 150 cm, and the mean height of 35 girls in the same class is 145 cm. The combined mean height of 60 students in the class is ___ (app)

A. 146

B. 143

C. 147

D. 145

Question 285

The mean of 100 observations is 40. It is found that an observation 84 was misread as 48. Then the correct mean is ?

A. 40.36

B. 41.24

C. 41.92

D. 42.05

Question 286

The mean of 100 observations was calculated as 40. It was found later on that one of the observations was misread as 83 instead of 53. The correct mean is:

A. 39

B. 39.7

C. 40.3

D. 42.7

Question 287

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

A. 2

B. 24

C. 26

D. 28

Question 288

The mean of 14 observations is 11. One more observation is included and the new mean becomes 12. The 15th observation is

A. 20

B. 24

C. 26

D. 28

Question 289

The mean of 21 observations (all different) is 40. If each observation greater than the median is increased by 21, then the mean of observations will become:

A. 50

B. 30

C. 50.5

D. 45

Question 290

The mean of 25 values was 40.But one value was written as 25 instead of 50.The corrected mean is

A. 39

B. 41

C. 40

D. 42

Question 291

The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :

A. 35

B. 36.5

C. 40

D. 42

Question 292

The mean of marks secured by 30 students in division-A of class X is 67, 55 students of division-B is 63 and that of 40 students of division-C is 61. What is the mean of marks of the students of three divisions of Class X?

A. 63.32

B. 62.62

C. 61.92

D. 64.72

Question 293

The mean of marks secured by 35 students in division A of class X is 65, 45 students of division B is 61 and that of 70 students of division C is 59. What is the mean of marks of the students of three divisions of Class X?

A. 60.3

B. 59.6

C. 61

D. 62.4

Question 294

The mean of marks secured by 45 students in division A of class X is 56, 40 students of division B is 52 and that of 40 students of division C is 50. Find the mean of marks of the students of three divisions of Class X.

A. 52.1

B. 51.4

C. 52.8

D. 54.2

Question 295

The mean of marks secured by 45 students in division A of class X is 69, 65 students of division B is 65 and that of 50 students of division C is 63. Find the mean of marks of the students of three divisions of Class X.

A. 65.5

B. 64.8

C. 64.1

D. 66.9

Question 296

The mean of marks secured by 50 students in division A of class X is 61, 25 students of division B is 57 and that of 50 students of division C is 55. What will be the mean of marks of the students of three divisions of Class X?

A. 57.1

B. 56.4

C. 59.2

D. 57.8

Question 297

The mean of marks secured by 55 students in division A of class X is 58, 45 students of division B is 54 and that of 75 students of division C is 52. Find the mean of marks of the students of three divisions of Class X.

A. 53.7

B. 54.4

C. 53

D. 55.8

Question 298

The mean of marks secured by 60 students in division A of class X is 64, 40 students of division B is 60 and that of 60 students of division C is 58. Find the mean of marks of the students of three divisions of Class X.

A. 60.05

B. 59.35

C. 62.15

D. 60.75

Question 299

The mean of marks secured by 60 students in division A of class X is 66, 45 students of division B is 62 and that of 75 students of division C is 60. Find the mean of marks of the students of three divisions of Class X.

A. 61.8

B. 62.5

C. 61.1

D. 63.9

Question 300

The mean of marks secured by 65 students in division A of class X is 54, 30 students of division B is 50 and that of 55 students of division C is 48. Find the mean of marks of the students of three divisions of Class X.

A. 50.3

B. 49.6

C. 51

D. 52.4

Question 301

The mean of the 5 smallest numbers from a group is 15 while the mean of all the 13 members of the group taken together is 17. What is the mean of the 8 largest numbers?

A. 18.5

B. 17.75

C. 18.75

D. 18.25

Question 302

The mean of the 5 smallest numbers from a group is 15 while the mean of all the numbers of the group taken together is 17. If the mean of the numbers leaving the smallest five out is 18.25,how many numbers were there in the group in all?

A. 13

B. 12

C. 8

D. 14

Question 303

The mean of the data 1, 1/2, 1/2, 3/4, 1/4, 2, 1/2, 1/4, 3/4 is

A. 15/18

B. 13/18

C. 7/9

D. 8/9

Question 304

The mean of the data 1, 2, 10, 18, 3, 17, 19 is

A. 7

B. 10

C. 17

D. 70

Question 305

The mean of the data 3, 10, 10, 4, 7, 10, 5 is

A. 18/7

B. 7

C. 39/7

D. 6

Question 306

The mean of three numbers is 1.5. The range of this data set is 8 while the difference between the two smallest numbers is 1. The greatest of the three numbers is

A. 24

B. 20

C. 18

D. 22

Question 307

The mean score in a test of the 10 boys in a class was 15 while the overall mean of the 25 students in the class was 16.2. What was the mean score of the girls?

A. 16.8

B. 17

C. 16.5

D. 17.5

Question 308

The mean score in a test of the 12 boys in a class was 16 while the overall mean of the 30 students in the class was 18.1. What was the mean score of the girls?

A. 19.8

B. 20.5

C. 20

D. 19.5

Question 309

The median of the data -3, 4, 0, 4, -2, -5, 1, 7, 10, 5 is

A. 2

B. 2.5

C. 2.75

D. 3

Question 310

The median of the numbers 14, 12, 12, 16, 13 and 18 is

A. 13

B. 14

C. 14.5

D. 13.5

Question 311

The median of the numbers 4, 2, 2, 6, 3 and 8 is

A. 4.5

B. 3.5

C. 4

D. 3

Question 312

The mode and median of the data 8, 6, 8, 7, 8, 6, 8, 7, 6 is

A. 7 and 8

B. 6 and 7

C. 8 and 7

D. 6 and 8

Question 313

The mode of the data 12, 1, 10, 1, 9, 3, 4, 9, 7, 9 is

A. 9

B. 12

C. 1

D. 7

Question 314

The ratio of number of boys and girls in a class is 2 : 3. The average weight of boys and girls in the class is 18 kg and 21 kg respectively. What is the average weight (in kgs) of all the boys and girls together?

A. 99/5

B. 101/5

C. 109/6

D. 96/5

Question 315

The ratio of speeds of a car, a train and a bus is 5:9:4. The average speed of the car, the bus and the train is 72 km/hr together. What is the average speed of the car and the train together ?

A. 84 km/hr

B. 96 km/hr

C. 72 km/hr

D. 60 km/hr

Question 316

If a+1a=2 then the vealue of a5+1a5 will be

A. 0

B. 1

C. 3

D. 2

Question 317

The simple interest on a sum for 20 years is 5/4 of the principal. What is the per annum rate (in percentage) of interest?

A. 6.25

B. 12.5

C. 2.5

D. 5

Question 318

The standard deviation of the set {10, 10, 10, 10, 10} is

A. 0

B. 1

C. 5

D. 10

Question 319

The sum of 15 observations of a data is (434 + x). If the mean of the data is x, then the value of x is

A. 31

B. 33

C. 27

D. 25

Question 320

The sum of a non-zero number and ten times its reciprocal is 7. Find the number.

A. 4

B. 3

C. 5

D. 6

Question 321

The total weight of school bags of 35 students of a class was 449.75 kg. What is the average weight of each school bag if each student carried only one school bag?

A. 12.75 kg

B. 12.85 kg

C. 12.84 kg

D. 12.95 kg

Question 322

The value of (2+32-3-342) is

A. 36

B. 336

C. 49

D. 49+3

Question 323

There are 100 students in 3 sections A, B and C of a class. The average marks of all the three sections was 84. The average of B and C was 87.5 and the average marks of students in A section was :

A. 20

B. 35

C. 54

D. 40

Question 324

There are 44 students in a hostel, due to the administration, 15 new students has joined. The expense of the mess increase by Rs. 33 per day. While the average expenditure per head diminished by Rs. 3, what was the original expenditure of the mess ?

A. Rs. 404

B. Rs. 514

C. Rs. 340

D. Rs. 616

Question 325

There are a total of 200 students in a school, of which 7/10th are boys. Find the number of girls in the school.

A. 80

B. 60

C. 40

D. 120

Question 326

There were 35 studentsina hostel.Ifthenumber of studentsbe increased by 7, the expenditure on food increases by Rs 42 per day while the average expenditure of studentsis reduced by Rs 1. What was the initial expenditure on food per day?

A. Rs 432

B. Rs 442

C. Rs 420

D. Rs 400

Question 327

Third proportion of 10 and 20 is

A. 30

B. 40

C. 25

D. 20

Question 328

Three maths classes: A, B and C take an algebra test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. What is the average score of classes A, B, C ?

A. 81

B. 78

C. 80.5

D. 81.5

Question 329

Two students appeared for an examination. One of them secured 21 marks more than the other and his marks were 80% of the sum of their marks. The marks obtained by them are

A. 88 and 67

B. 89 and 68

C. 28 and 7

D. 98 and 77

Question 330

Two students appeared for an examination. One of them secured 26 marks more than the other and his marks were 75% of the sum of their marks. The marks obtained by them are

A. 53 and 27

B. 60 and 34

C. 39 and 13

D. 78 and 52

Question 331

What is the average of 36, 43, 51, 68, and 77?

A. 47

B. 49

C. 55

D. 64

Question 332

What is the average of 90, 250, 240, 204, and 616?

A. 280

B. 210

C. 230

D. 255

Question 333

What is the average of all natural numbers from 21 to 39?

A. 30

B. 31

C. 29

D. 28

Question 334

What is the average of all numbers between 100 and 200 which are divisible by 13?

A. 147.5

B. 145.5

C. 143.5

D. 149.5

Question 335

What is the average of all numbers between 11 and 80 which are divisible by 6?

A. 46

B. 47

C. 44

D. 45

Question 336

What is the average of all numbers between 8 and 74 which are divisible by 7?

A. 40

B. 41

C. 42

D. 43

Question 337

What is the average of all numbers between 9 and 90 which are divisible by 8?

A. 53

B. 52

C. 51

D. 50

Question 338

What is the average of all the one digit and two digit natural numbers?

A. 25

B. 40

C. 50

D. 99

Question 339

What is the average of all the one digit, two digit and three digit natural numbers?

A. 300

B. 500

C. 1000

D. 1250

Question 340

What is the average of first 19 odd numbers?

A. 9.5

B. 15.5

C. 19

D. 38

Question 341

What is the average of first 39 even numbers ?

A. 39

B. 40

C. 20

D. 68

Question 342

What is the average of first 7 multiples of 7?

A. 7

B. 14

C. 28

D. 21

Question 343

What is the average of first 93 natural numbers?

A. 45

B. 46

C. 47

D. 49

Question 344

What is the average of four tenths and five thousandths

A. 25002

B. 2502

C. 0.2025

D. none

Question 345

What is the mean of the first five Triangular Numbers?

A. 8

B. 7

C. 6

D. 5

Question 346

What will be the average of all the prime numbers before 19?

A. 8.28

B. 11.5

C. 5.34

D. 9.63

Question 347

What will be the cost of building a fence around a square plot with area equal to 289 sq ft, if the price per foot of building the fence is Rs. 58 ?

A. Rs. 3748

B. Rs. 3847

C. Rs. 3944

D. Rs. 3154

Question 348

When all the students in a school are made to stand in rows of 54, 30 such rows are formed. If the students are made to stand in rows of 45, how many such rows will be formed ?

A. 22

B. 36

C. 32

D. 26

Question 349

Without any stoppage, a person travels a certain distance at an average speed of 42 km/h, and with stoppages he covers the same distance at an average speed of 28 km/h. How many minutes per hour does he stop?

A. 15 minutes

B. 20 minutes

C. 18 minutes

D. 22 minutes

Question 350

The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team ?

A. 20 years

B. 21 years

C. 23 years

D. 25 years

Question 351

In a primary school the average weight of male students is 65.9 kg and the average weight of female students is 57 kg. If the average weight of all the students ( both male and female ) is 60.3 kg and the number of male students in the school is 66, what is the number of female students in the school?

A. 162

B. 168

C. 180

D. 112

Question 352

The average weight of a group of 75 girls was calculated as 47 kgs. It was later discovered that the weight of one of the girls was read as 45 kgs. Whereas her actual weight was 25 kgs. What is the actual average weight of the group of 75 girls? ( Rounded off to two digits after decimal).

A. 34

B. 36

C. 30

D. None of these

Question 353

Find the average of the following sets of scores:385, 441, 876, 221, 536, 46, 291, 428

A. 221

B. 403

C. 428

D. 536

Question 354

If 25a + 25b = 115, what is the average of a and b?

A. 2.5

B. 3.4

C. 4.5

D. None of the above

Question 355

The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is -

A. 45 kg

B. 50 kg

C. 53 kg

D. 55 kg

Question 356

The average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class, thereby decreasing the average by 4 years. The original strength of the class was-

A. 10

B. 11

C. 12

D. 15

Question 357

The average of the first five multiples of 3 is-

A. 3

B. 9

C. 12

D. 15

Question 358

The average of X1, X2 and X3 is 14. Twice the sum of X2 and X3 is 30. What is the value of X1?

A. 12

B. 16

C. 20

D. 27

Question 359

The average sale of car dealership was 15 cars per week. After a promotional scheme the average sale increased to 21 cars per week. The percentage increased in the sale of cars was-

A. 39.33%

B. 40%

C. 42$$\frac{6}{7}$$%

D. 140%

Question 360

The average age of the mother and her six children is 12 years which is reduced by 5 years if the age of the mother is excluded. How old is the mother ?

A. 40 years

B. 42 years

C. 48 years

D. 50 years

Question 361

The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is-

A. 15 years

B. 15.5 years

C. 16 years

D. Cannot be computed with the given information

Question 362

Amount five people with monthly income (in Rs.) 15000, 26000, 16000, 19000, 50000, how many will have income less than the mean income of five people?

A. 1

B. 2

C. 3

D. 4

Question 363

If the arithmetic mean of 0, 5, 4, 3 is a, that of -1, 0, 1, 5, 4, 3 is b and that of 5, 4, 3 is c, then the relation between a, b, and c is

A. a = b = c

B. a : b : c = 3 : 2 : 4

C. 4a = 5b = c

D. a + b + c = 12

Question 364

In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only son is 27 years. What is the age of the son?

A. 10 years

B. 10.5 years

C. 11 years

D. 12 years

Question 365

Find the average of all the numbers between 6 and 34 which are divisible by 5 -

A. 18

B. 20

C. 24

D. 30

Question 366

The mean of 25 observations was found to be 78.4. But later on it was found that 96 were misread as 69. The correct means is-

A. 76.54

B. 78.4

C. 79.48

D. 81.32

Question 367

The average temperature for the first four days of a week is 40.2° C and that of the last four days is 41.3° C. If the average temperature for the whole 40.6°C, then the temperature on the fourth day is-

A. 40.8° C

B. 41.3° C

C. 41.8° C

D. 38.5° C

Question 368

The average of five numbers is 306.4. The average of the first two numbers is 431 and the average of the last two numbers is 214.5. What is the third number?

A. 52

B. 108

C. 321

D. None of the above

Question 369

The average of six numbers is x and the average of three of these is y. If the average of the remaining three is z, then-

A. x = y + z

B. 2x = y + z

C. x = 2y + 2z

D. None of these

Question 370

The average of the first 100 positive integers is-

A. 49.5

B. 50.5

C. 51

D. 100

Question 371

After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the ages of the replaced and the new member?

A. 2 years

B. 4 years

C. 8 years

D. 15 years

Question 372

The average weight of 8 men is increased by 1.5 kg when one of the men, who weight 65 kg is replaced by a new man. The weight of the new man is-

A. 70 kg

B. 74 kg

C. 76 kg

D. 77 kg

Question 373

Total expenses of a boarding house are partly fixed and partly varying linearly with the number of boarders. The average expense per boarder is Rs. 700 when there are 25 boarders and Rs. 600 when there are 50 boarders. What is the average expense per boarder when there are 100 boarders?

A. Rs. 540

B. Rs. 550

C. Rs. 570

D. Rs. 580

Question 374

A shop of electronic goods is closed on Monday. The average daily sales for remaining six days of a week is Rs. 15,640 and the average sale of Tuesday to Saturday is Rs. 14,124. The sales on Sunday is -

A. Rs. 20,188

B. Data inadequate

C. Rs. 23,220

D. Rs. 21,704

Question 375

The average expenditure of a man for the first five months is Rs. 1200 and for the next seven months is Rs. 1300. If he saves Rs. 2900 in that year, his monthly average income is-

A. Rs. 1500

B. Rs. 1600

C. Rs. 1700

D. Rs. 1400

Question 376

The average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 kg. What was the teacher’s weight?

A. 86 kg

B. 64 kg

C. 72 kg

D. 84 kg

Question 377

In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average of the school is 11 years 9 months, then the average the number of girls in the school is :

A. 150

B. 250

C. 350

D. 450

Question 378

The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean score of 80 and the dullest 25% a mean score of 31. The mean score of remaining 55% is-

A. 45

B. 50

C. 51.4 approx

D. 54.6 approx

Question 379

The average age of 3 children in a family is 20% of the average age of the father and the eldest child. The total age of the mother and the youngest child is 39 years. If the father's age is 26 years, what is the age of the second child ?

A. 15 years

B. 18 years

C. 20 years

D. Cannot be determined

Question 380

Five years ago the average age of A, B, C, D was 45 years. By including X the present average of all the five is 49 years. Them the present age of X is-

A. 40 years

B. 45 years

C. 48 years

D. 64 years

Question 381

A cricketer whose bowling average is 12.4 runs per wicket takes 5 wickets for 26 runs and thereby decreased his average by 0.4. The number of wickets taken by him the last match was-

A. 64

B. 72

C. 80

D. 85

Question 382

The average of 11 players of a cricket team is decreased by 2 months when two of them aged 17 years and 20 years are replaced by two new players. The average age of the new players is-

A. 17 years 1 month

B. 17 years 7 months

C. 17 years 11 months

D. 18 years 3 months

Question 383

The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is Rs. 6250 and the average monthly income of P and R is Rs. 5200. The monthly income of P is-

A. Rs. 3500

B. Rs. 4000

C. Rs. 4050

D. Rs. 5000

Question 384

The average of the ages of Sumit, Krishna and Rishabh is 43 and the average of the ages of Sumit, Rishabh and Rohit is 49. If Rohit is 54 years old, what is Krishna’s age?

A. 24 years

B. 36 years

C. 45 years

D. Cannot be determined

Question 385

A library has an average of 510 visitors on Sundays and 240 on other days. What is the average number of visitors per day in the month of June beginning with a Sunday?

A. 276

B. 280

C. 285

D. 250

Question 386

The average of 6 numbers is 7. The average of three numbers of them is 5. What will be the average of remaining numbers?

A. 15

B. 30

C. 9

D. 42

Question 387

Find the average of 205, 302, 108, 403, and 202-

A. 450

B. 1125

C. 244

D. 1220

Question 388

The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5°C. If the mean of the whole week is 25.2°C, then the temperature of the 4th day is-

A. 25.2°C

B. 25.5°C

C. 25.6°C

D. 25°C

Question 389

The average weight of A, B and C is 40 kgs. Weight of C is 24 kgs more than A’s weight and 3 kgs less than B’s weight. What will be the average weight of A, B, C and D, if D weights 15 kgs less than C?

A. 42 kgs

B. 40 kgs

C. 36 kgs

D. 38 kgs

Question 390

The average of 11 results is 60. If the average of first six results is 58 and that of last six is 63, find the 6th result-

A. 66

B. 55

C. 64

D. 68

Question 391

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is-

A. 1 : 2

B. 2 : 3

C. 3 : 4

D. 3 : 5

Question 392

The average score of a class of boys and girls in an examination is A. The ratio of boys and girls in the class is 3 : 1. If the average score of the boys is A + 1, the average score of the girls is-

A. A - 1

B. A - 3

C. A + 1

D. A + 3

Question 393

Ten years ago, the ages of the members of a joint family of eight people added up to 231 years. Three years later, one member died at the age of 60 years and a child was born during the same year. After another three years, one more member died, again at 60, and a child was born during the same year. The current average of this eight-member joint family is nearest to-

A. 21 years

B. 22 years

C. 23 years

D. 24 years

Question 394

Four years ago, the average age of a family of four persons was 18 years. During this period, a baby was born. Today if the average age of the family is still 18 years, the age of the baby is

A. 1.2 years

B. 2 years

C. 2.5 years

D. 3 years

Question 395

When the average age of a couple and their son was 42 years, the son married and got a child after one year. When the child was 5 years old, the average age of the family became 36 years. What was the age of daughter-in- law at the time of their marriage ?

A. 23 years

B. 24 years

C. 25 years

D. 26 years

Question 396

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is-

A. 35 years

B. 40 years

C. 50 years

D. None of these

Question 397

Four years ago, the average age of A and B was 18 years. At present the average age of A, B, and C is 24 years. What would be the age of C after 8 years?

A. 25 years

B. 28 years

C. 32 years

D. 36 years

Question 398

The average weight of 3 men A, B, and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E, whose weight is 3 kg more than that of D, replaces A, then the average weight of B, C, D and E becomes 79 kg. The weight if A is-

A. 70 kg

B. 72 kg

C. 75 kg

D. 80 kg

Question 399

A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If had scored 92 points, the average score for the team would have been 84. The number of points, the team scored was-

A. 588

B. 645

C. 665

D. 672

Question 400

A batsman makes a score of 84 runs in the 21st inning and thus increases his average by 2 runs. His average after 21st inning is-

A. 24

B. 34

C. 44

D. 54

Question 401

When 15 is included in a list of natural numbers, their mean is increased by 2. When 1 is included in this new list, the mean of the numbers in the new list is decreased by 1. How many numbers were there in the original list?

A. 4

B. 5

C. 6

D. 8

Question 402

The average temperature of the town in the first four days of month was 58 degrees. The average for the second, third, fourth and fifth days was 60 degrees. If the temperature of the first and fifth days were in the ratio 7 : 8, then what is the temperature on the fifth day?

A. 64 degrees

B. 62 degrees

C. 56 degrees

D. None of these

Question 403

The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is :

A. 11

B. 11.3

C. 11.4

D. 11.5

Question 404

A pupil’s marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half. The number of pupils in the class is-

A. 10

B. 20

C. 40

D. 73

Question 405

The average marks in Science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 instead of the actual marks 72 and 61 respectively, what would be the correct average?

A. 66

B. 68.5

C. 69

D. 69.5

Question 406

If the arithmetic mean of seventy-five numbers us calculated, it is 35. If each number is increased by 5, then mean of new numbers is:

A. 30

B. 40

C. 70

D. 90

Question 407

A student obtained 60, 75 and 85 marks respectively in three monthly examinations in Physics and 95 marks in the final examination. The three monthly examinations are equal weighted whereas the final examination is weighted twice as much as a monthly examination. His average marks in physics are-

A. 78.75

B. 79

C. 82

D. 85

Question 408

The average age of all the students of a class is 18 years. The average age of boys of the class is 20 years and that of the girls is 15 years. If the number of girls in the class is 20, then find the number of boys in the class.

A. 15

B. 30

C. 45

D. 50

Question 409

In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the rate in the remaining 40 overs to each the target of 282 runs?

A. 6.25

B. 6.5

C. 6.75

D. 7

Question 410

If the average of 5 numbers is 10, the number which should be added to make the average 12 is-

A. 12

B. 18

C. 22

D. 24

Question 411

The batting average for 40 innings of a cricket player is 50 runs. His highest score exceeds his lowest score by 172 runs. If these two innings are excluded, the average of the remaining 38 innings is 48 runs. The highest score of the player is

A. 165 runs

B. 170 runs

C. 165 runs

D. 174 runs

Question 412

The average marks of a student in 8 subjects is 87. Of these, the highest marks are 2 more than the one next in value. If these two subjects are eliminated, the average marks of the remaining subjects are 85. What are the highest marks now obtained by him?

A. 89

B. 91

C. 94

D. 96

Question 413

The average of 80 boys in a class is 15. The average age of a group of 15 boys in the class is 16 and the average age of another 25 boys in the class is 14. What is the average age of the remaining boys in the class?

A. 14

B. 14.75

C. 15.25

D. Cannot be determined

Question 414

The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new average becomes 47. The new observation is-

A. 46

B. 50

C. 56

D. 58

Question 415

If the average temperature of first four days of the week was 39°C and the average temperature of the week was 40°C, then what was the average temperature of the last three days of the week?

A. 39.9°C

B. 40.9°C

C. 41.3°C

D. 42.1°C

Question 416

The average salary of all the workers in a workshop is Rs. 8,000. The average salary of 7 technicians is Rs. 12,000 and the average salary of the rest is Rs. 6,000. The total number of workers in the workshop is:

A. 20

B. 21

C. 22

D. 23

Question 417

The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?

A. 23 years

B. 24 years

C. 25 years

D. None of these

Question 418

In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother doest not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Arun?

A. 67 kg.

B. 68 kg.

C. 69 kg.

D. Data inadequate

Question 419

The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is:

A. 17 kg.

B. 20 kg.

C. 26 kg.

D. 31 kg.

Question 420

The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.

A. 47.55 kg.

B. 48 kg.

C. 48.55 kg.

D. 49.25 kg.

Question 421

The marks of six boys in a group are 48, 59, 87, 37, 78 and 57. What are the average marks of all six boys?

A. 61

B. 65

C. 69

D. None of these

Question 422

Six numbers are arranged in decreasing order. The average of the first five numbers is 30 and the average of the last five numbers is 25. The difference of the first and the last numbers is

A. 20

B. 25

C. 5

D. 30

Question 423

The body weight of seven students of a class is recorded as 54 kg, 78 kg, 43 kg, 82 kg, 67 kg, 42 kg and 75 kg. What is the average body weight of call the seven students?

A. 63 kg

B. 69 kg

C. 741 kg

D. 73 kg

Question 424

There are five boxes in a cargo hold. The weight of the first box is 200 kg and the weight of the second box is 20% more than the weight of third box, whose weight is 25% more than the first box’s weight. The fourth box at 350 kg is 30% lighter than the fifth box. The difference in the average weight of the four heaviest boxes and the four lightest boxes is-

A. 37.5 kg

B. 51.5 kg

C. 75 kg

D. 112.5 kg

Question 425

The average of 4 positive integers is 59. The highest integer is 83 and the lowest integer is 29. The difference between the remaining two integers is 28. Which of the following integers is higher of the remaining two integers ?

A. 39

B. 48

C. 76

D. Cannot be determined

Question 426

A person purchase 1 kg of tomatoes from each of the 4 places at the rate of 1 kg, 2 kg, 3 kg, 4 kg per rupee respectively. On an average, he has purchased x kg of tomatoes per rupee. Then the value of x is-

A. Rs. 1.92

B. Rs. 2

C. Rs. 2.50

D. None of these

Question 427

Out of 9 persons, 8 persons spent Rs. 30 each for their meals. The ninth one spent Rs. 20 more than the average expenditure of all the nine. The total money spent by all of them was-

A. Rs. 260

B. Rs. 290

C. Rs. 292.50

D. Rs. 400.50

Question 428

Of the three numbers, the average of the first and the second is greater than the average of the second and the third by 15. What is the difference between the first and the third of the three numbers?

A. 15

B. 45

C. 60

D. None of the above

Question 429

The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so as to increase his average of runs by 4 ?

A. 2

B. 4

C. 70

D. 76

Question 430

There are 3 groups of students, each containing 25, 50 and 25 students respectively. The mean marks obtained by the first two groups are 60 and 55. The combined mean of all the three groups is 58. What is the mean of the marks scored by the third group ?

A. 52

B. 57

C. 58

D. None of the above

Question 431

The average age of seven boys sitting in a row facing North is 26 years. If the average age of the first three boys is 19 years and the average age of the last three boys is 32 years, what is the age of the boy who is sitting in the middle of the row?

A. 24 years

B. 28 years

C. 29 years

D. 31 years

Question 432

The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average of the whole team. What is the average age of the team?

A. 23 years

B. 24 years

C. 25 years

D. None of these

Question 433

A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/ hr. His average speed for the whole journey in km/hr is-

A. 35 km/hr

B. 37 km/hr

C. 37.5 km/hr

D. 40 km/hr

Question 434

The average age of a husband and wife at the time of their marriage was 25 years. A son was born to them two years after their marriage. The present average age of all three of them is 24 years. How many years is it since the couple got married?

A. 5 years

B. 6 years

C. 8 years

D. 9 years

Question 435

The average age of a group of persons going for picnic is 16 years. Twenty new persons with an average age of 15 years join the group on the spot due to which their average age become 15.5 years. The number of persons initially going for picnic is -

A. 5

B. 10

C. 20

D. 30

Question 436

A certain factory employed 600 men and 400 women and the average wage was Rs. 25.50 per day. If women got Rs. 5 less than a man, then what are their daily wages?

A. Man: Rs. 25, Woman: Rs. 20

B. Man: Rs. 27.50, Woman: Rs. 22.50

C. Man: Rs. 30, Woman: Rs. 25

D. Man: Rs. 32.50, Woman: Rs. 27.50

Question 437

A coaching institute has students in 3 batches – X, Y and Z. In a certain examination, the average marks obtained by these batches are 72, 60 and 50 respectively. The average marks of batches X and Y taken together is 69. If the ratio of the number of students in batches Y and Z is 6 : 7. What is the average score of all the three batches put together?

A. 59

B. 61.6

C. 63.5

D. 64.7

Question 438

In an engineering college the average salary of all engineering graduates from Mechanical trade is Rs. 2.45 lacs per annum and that of the engineering graduates from Electronics trade is Rs. 3.56 lacs per annum. The average salary of all Mechanical and Electronics graduates is Rs. 3.12 lacs per annum. Find the least number of Electronics graduates passing out from this institute.-

A. 43

B. 59

C. 67

D. Cannot be determined

Question 439

Mr. Joe’s family consists of six people-himself, his wife and their four children. It is known that the average age of the family immediately after the birth of the first, second, third and fourth child was 16, 15, 16 and 15 years respectively. Find the age of Mr. Joe’s eldest son if the present average age of the entire family is 16 years -

A. 8 years

B. 12 years

C. 15 years

D. 16 years

Question 440

Out of 10 teachers of a school, on teacher retires and in place of him a new teacher 25 years old joins. As a result of it average age of the teachers reduces by 3 years. Age of the retired teacher ( in years) is :

A. 55

B. 60

C. 58

D. 56

Question 441

The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is-

A. 20

B. 21

C. 22

D. 23

Question 442

The average age of a husband and his wife was 23 years at the times of their marriage. After five years they have a one-year old child. The average age of the family now is-

A. 19 years

B. 23 years

C. 28.5 years

D. 29.3 years

Question 443

In a class with a certain number of students, if one student weighting 50 kg is added then the average weight of the class increased by 1 kg. If one more student weighting 50 kg is added, then the average weight of the class increased by 1.5 kg over the original average. What is the original average weight (in kg) of the class?

A. 2

B. 4

C. 46

D. 47

Question 444

The average height of 25 boys is 1.4 m. When 5 boys leave the group, then the average height increased by 0.15 m. What is the average height of the 5 boys who leave ?

A. 0.8 m

B. 0.9 m

C. 0.95 m

D. 1.05 m

Question 445

The average monthly income of a family of four earning members was Rs. 15130. One of the daughters in the family got married and left home, so the average monthly income of the family came down to Rs. 14660. What is the monthly income of the married daughter?

A. Rs. 12000

B. Rs. 15350

C. Rs. 16540

D. Cannot be determined

Question 446

The average marks obtained by 22 candidates in an examination are 45. The average marks of the first ten are 55 and that of the last eleven are 40. The number of marks obtained by the 11th candidates is-

A. 0

B. 45

C. 47.5

D. 50

Question 447

The average of 10 numbers is 40.2. Later it is found that two numbers have been wrongly added. The first is 18 greater than the actual number and the second number added is 13 instead of 33. Find the correct average.

A. 40.2

B. 40.4

C. 40.6

D. 40.8

Question 448

The average height of 35 girls in a class was calculated as 160 cm. It was later found that the height of one of the girls in the class was wrongly written as 144 cm, whereas her actual height was 104 cm. What is the actual average height of the girls in the class? ( rounded off to 2 digits after decimal)-

A. 158.54 cm

B. 158.74 cm

C. 159.56 cm

D. None of the above

Question 449

A student obtained the following marks in percentage in his semester examination English 50, Maths 65, Statistics 70, Economics 58 and Accountancy 63. The weights of these subjects are 2, 2, 1, 1 and 1 respectively. What is the weighted arithmetic mean?

A. 60

B. 61

C. 62

D. 63

Question 450

Visitor to a show were charged Rs. 15 each on the first day, Rs. 7.50 each on the second day and Rs. 2.50 each on the third day. The attendance on the three days was in the ratio 2 : 5 : 13. The average charge per person for the whole show was-

A. Rs. 5

B. Rs. 6.33

C. Rs. 7.50

D. Rs. 9

Question 451

A company produces on an average 4000 items per must for the first 3 months. How many items it must produce on an average per month over the next 9 months, to average 4375 items per month over the whole?

A. 4500

B. 4600

C. 4680

D. 4710

Question 452

In a cricket eleven, the average age of eleven players is 28 years. Out of these, the average age of three groups of three players each are 25 years, 28 years and 30 years respectively. If in these groups the captain and the youngest player are not included and the captain is eleven years older than the youngest player, what is the age of the captain?

A. 33 years

B. 34 years

C. 35 years

D. 36 years

Question 453

The mean monthly salary paid to 75 workers in a factory is Rs. 5680. The mean salary of 25 of them is Rs. 5400 and that of 30 others is Rs. 5700. The mean salary of the remaining workers is-

A. Rs. 5000

B. Rs. 6000

C. Rs. 7000

D. Rs. 8000

Question 454

There were 35 students in a hostel. If the number of the students is increased by 7, then the expenses of the mess increased by Rs. 42 per day, while the average expenditure per head diminishes by Rs. 1. The original expenditure of the mess per day was-

A. Rs. 400

B. Rs. 420

C. Rs. 432

D. Rs. 442

Question 455

The mean of 5 numbers is 18. If one number is excluded, their mean is 16. Find the excluded number.

A. 25

B. 26

C. 27

D. 28

Question 456

The arithmetic mean of 15 numbers is 41.4. Then the sum of these numbers is-

A. 414

B. 420

C. 620

D. 621

Question 457

There are 4 consecutive odd numbers (x1, x2, x3 and x4) and three consecutive even numbers (y1, y2 and y3). The average of the odd numbers is 6 less than the average of the even numbers. If the sum of the three even numbers is 16 less than the sum of the four odd numbers, what is the average of x1, x2, x3 and x4?

A. 30

B. 38

C. 32

D. 34

Question 458

There are three positive numbers. One third of the average of all the three numbers is 8 less than the value of the highest number. The average of the lowest and the second lowest number is 8. What is the highest number?

A. 11

B. 14

C. 10

D. 9

Question 459

Average score of a class of 60 students, in an exam, was 43. Average score of the students who had passed is 52 and the average score of students who had failed is 16. How many failed the exam?

A. 25

B. 20

C. 15

D. 18

Question 460

The average weight of boys in a class is 30 kg and the average weight of girls in the same class is 20 kg. If the average weight of the whole class is 23.25 kg, what could be the possible strength of boys and girls respectively in the same class?

A. 14 and 26

B. 13 and 27

C. 17 and 17

D. None of these

Question 461

The mean monthly salary paid to graduating MBA class of a management institute is Rs. 16000. The mean monthly salary paid to students with work experience is Rs. 18000. The corresponding figure for the students without any work experience is Rs. 12000. Determine the percentage of students with work experience and those without any work experience in the class.

A. 66.67%, 33.33%

B. 33.33%, 66.67%

C. 75%, 25%

D. 25%, 75%

Question 462

The monthly incomes of five persons are Rs. 1132, Rs. 1140, Rs. 1144, Rs. 1136 and Rs. 1148 respectively. What is their arithmetic mean?

A. Rs. 1100

B. Rs. 1120

C. Rs. 1132

D. Rs. 1140

Question 463

Kunal bought 65 books for Rs. 1050 from one shop and 50 books for Rs. 1020 from another. What is the average price he paid per book?

A. Rs. 18

B. Rs. 18.20

C. Rs. 24

D. Rs. 36.40

Question 464

Average age of ten persons learning yoga is 32 years. When the age of their instructor is added, the average age becomes 34 years. The age of their instructor is-

A. 46 years

B. 52 years

C. 54 years

D. 56 years

Question 465

There were 24 students in a class. One of them, who was 18 years old, left the class and his place was filled up by a newcomer. If the average of the class thereby, was lowered by one month, the age of the newcomer is-

A. 14 years

B. 15 years

C. 16 years

D. 17 years

Question 466

Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average by 8 runs. His new average is:

A. 20

B. 21

C. 28

D. 32

Question 467

The average temperature for Wednesday, Thursday and Friday was 40°C. The average for Thursday, Friday and Saturday was 41° C. If temperature on Saturday was 42° C, what was the temperature on Wednesday?

A. 39° C

B. 44° C

C. 38° C

D. 41° C

Question 468

The average of the first five multiples of 9 is:

A. 20

B. 27

C. 28

D. 30

Question 469

The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey.

A. 125 km/hr

B. 75 km/hr

C. 135 km/hr

D. 120 km/hr

Question 470

Find the average of first 97 natural numbers.

A. 47

B. 37

C. 48

D. 49

Question 471

The average age of three boys is 15 years. If their ages are in ratio 3 : 5 : 7, the age of the youngest boy is

A. 21 years

B. 18 years

C. 15 years

D. 9 years

Question 472

The average of a group of men is increased by 5 years when a person aged of 18 years is replaced by a new person of aged 38 years. How many men are there in the group?

A. 3

B. 4

C. 5

D. 6

Question 473

In a boat there are 8 men whose average weight is increased by 1 kg when 1 man of 60 kg is replaced by a new man. What is weight of new comer?

A. 70 kg

B. 66 kg

C. 68 kg

D. 69 kg

Question 474

The average of 25 results is 18. The average of first 12 of those is 14 and the average of last 12 is 17. What is the 13th result?

A. 74

B. 75

C. 69

D. 78

Question 475

The average monthly salary of 660 workers in a factory is Rs. 380. The average monthly salary of officers is Rs. 2100 and the average monthly salary of the other workers is Rs. 340. Find the number of other workers.

A. 645

B. 650

C. 640

D. 642

Question 476

The average marks of four subjects is 120. If 33 was misread as 13 during the calculation, what will be the correct average?

A. 122

B. 120

C. 125

D. 121

Question 477

Students of three different classes appeared in common examination. Pass average of 10 students of first class was 70%, pass average of 15 students of second class was 60% and pass average of 25 students of third class was 80% then what will be the pass average of all students of three classes?

A. 74%

B. 75%

C. 69%

D. 72%

Question 478

A man travels equal distances of his journey at 40, 30 and 15 km/h. respectively. Find his average speed for whole journey.

A. 24

B. 25

C. 27

D. 28

Question 479

Five years ago, the average age of A, B, C and D was 45 yr. with E joining them now, the average of all the five is 49 yr. How old is E?

A. 25 years

B. 40 years

C. 45 years

D. 64 years

Question 480

Average of 80 numbers are 42. When 5 more numbers are included, the average of 85 numbers become 45. Find the average of 5 numbers.

A. 82

B. 89

C. 93

D. 98

Question 481

Find the average increase rate, if increase in the population in the first year is 30% and that in the second year is 40%.

A. 41%

B. 56%

C. 40%

D. 38%

Question 482

A batsman makes a score of 270 runs in the 87th inning and thus increase his average by a certain number of runs that is a whole number. Find the possible values of the new average.

A. 98

B. 184

C. 12

D. All of these

Question 483

There are five boxes in cargo hold. The weight of the first box is 200 kg and the weight of the second box is 20% higher than the weight of the third box, whose weight is 25% higher than the first box's weight. The fourth box at 350 kg is 30% lighter than the fifth box. Find the difference in the average weight of the four heaviest boxes and the four lightest boxes.

A. 51.5 kg

B. 75 kg

C. 37.5 kg

D. 112.5 kg

Question 484

A school has only four classes that contain 10, 20, 30 and 40 students respectively. The pass percentage of these classes are 20%, 30%, 60% and 100% respectively. Find the pass % of the entire school.

A. 56%

B. 76%

C. 34%

D. 66%

Question 485

19 people went to a hotel for combine dinner party 13 of them spent Rs. 79 each on their dinner and rest spent 4 more than the average expenditure of all the 19. What was the total money spent by them.

A. 1628.4

B. 1534

C. 1492

D. None of the above

Question 486

A cricketer scored some runs in his 21st innings, as a result, his average runs increased by 3. If the present average run is 40, how many runs he scored in the final innings?

A. 103

B. 100

C. 85

D. 82

Question 487

A man has 'n' magical eggs whose average weight is 'k' gm. Each of the 'n' eggs produces 'n' eggs next day such that the average weight of 'n' eggs produced is same as that of the parental egg for each 'n' groups individually i.e. each egg produces 'n' eggs of next generation and average weight of all the 'n' eggs of next generation is same as the weight of the mother egg. This process is continued without any change in pattern. What is the total weight of all the eggs of rth generation, where the initial number of eggs with man are considered as the eggs of first generation.

A. rnk

B. rnk

C. nkr

D. nrk

Question 488

A man started his journey from Lucknow to Kolkata, which is 200 km, at the speed of 40 kmph then he went to Banglore which is 300 km, at the speed of 20 kmph. Further he went to Ahmedabad which is 500 km, at the speed of 10 kmph. The average speed of the man is :

A. 14$${\frac{2}{7}}$$ kmph

B. 14$${\frac{5}{7}}$$ Kmph

C. 15.6 kmph

D. 16.1 kmph

Question 489

The average age of A, B, C, D and E is 40 years. The average age of A and B is 35 years and the average of C and D is 42 years. Age of E is :

A. 48 years

B. 46 years

C. 42 years

D. 45 years

Question 490

The mean weight of 100 students in a class is 46 kg. The mean weight of boys is 50 and of girls is 40 kg. Therefore, the number of boys is:

A. 50

B. 60

C. 70

D. 65

Question 491

There are three categories of jobs A, B and C. The average salary of the student who got the job of A and B categories is 26 lakh per annum. The average salary of the students who got the job of B and C category is 44 lakh per annum and the average salary of those students who got the job of A and C categories is 34 lakh per annum. The most appropriate (or closet) range of average salary of all the three categories (if it is known that each student gets only one category of jobs i.e. , A, B and C):

A. lies between 30 and 44

B. lies between 28 and 34

C. lies between 34 and 44

D. lies between 27 and 44

Question 492

A has 50 coins of 10 paise denominations. While B has 10 coins of 50 paise denominations. C has 20 coins of 25 paise denominations while D has 25 coins of 20 paise denominations. The average number of paise per person is :

A. 450 paise

B. 500 paise

C. 550 paise

D. 650 paise

Question 493

The average income of A, B and C is Rs. 12,000 per month and average income of B, C and D is Rs. 15,000 per month. If the average salary of D be twice that of A, then the average salary of B and C is in Rs. :

A. 8000

B. 18000

C. 13500

D. 9000

Question 494

A passenger travels from Delhi to Merut at a speed of 30 kmph and return with a speed of 60 kmph. What is the average speed?

A. 40

B. 45

C. 50

D. 48

Question 495

The average of 20 students is 12 years, if the teacher's age is included, average increases by one. The age of the teacher is:

A. 30 years

B. 33 years

C. 28 years

D. 35 years

Question 496

The average wages of a worker during a fortnight comprising 15 consecutive working days was Rs. 90 per day. During the first 7 days, his average wages was Rs. 87/day and the average wages during the last 7 days was Rs. 92/day. What was his wage on the 8th day?

A. 93

B. 90

C. 92

D. 97

Question 497

40% of the employees in a factory are workers. All the remaining employees are executives. The annual income of each worker is Rs. 390. The annual income of each executive is Rs. 420. What is the average annual income of all the employees in the factory together?

A. 390

B. 405

C. 408

D. 415

Question 498

The average price of 10 books is Rs.12 while the average price of 8 of these books is Rs.11.75. Of the remaining two books, if the price of one book is 60% more than the price of the other, what is the price of each of these two books?

A. Rs. 5, Rs.7.50

B. Rs. 8, Rs. 12

C. Rs. 16, Rs. 10

D. Rs. 12, Rs. 14

Question 499

In a set of three numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers?

A. 2

B. 2.5

C. 3

D. 3.5

Question 500

The average monthly salary of 12 workers and 3 managers in a factory was Rs. 600. When one of the manager whose salary was Rs. 720, was replaced with a new manager, then the average salary of the team went down to 580. What is the salary of the new manager?

A. 640

B. 690

C. 420

D. 570

Question 501

The average of five different positive numbers is 25. x is the decrease in the average when the smallest number among them is replaced by 0. What can be said about x?

A. x is less than 5

B. x is greater than 5

C. x is equal to 5

D. Cannot be determined

Question 502

In 2011, the arithmetic mean of the annual incomes of Ramesh and Suresh was Rs. 3800. The arithmetic mean of the annual incomes of Suresh and Pratap was Rs. 4800, and the arithmetic mean of the annual incomes of Pratap and Ramesh was Rs. 5800. What is the arithmetic mean of the incomes of the three?

A. Rs. 4000

B. Rs. 4200

C. Rs. 4400

D. Rs. 4800

Question 503

In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Arun?

A. 67 kg.

B. 68 kg.

C. 69 kg.

D. Data inadequate

Question 504

A student finds the average of 10 positive integers. Each integer contains two digits. By mistake, the boy interchanges the digits of one number say ba for ab. Due to this, the average becomes 1.8 less than the previous one. What was the difference of the two digits a and b?

A. 8

B. 6

C. 2

D. 4

Question 505

The average of first five multiples of 3 is:

A. 9

B. 10

C. 8

D. 11

Question 506

There are two sections A and B of a class, consisting of 36 and 44 students' respectively. If the average weight of section A is 40kg and that of section B is 35kg, find the average weight of the whole class.

A. 30 kg

B. 35 kg

C. 42.5 kg

D. 37.25 kg

Question 507

Distance between two stations A and B is 778km. A train covers the journey from A to B at 84 km per hour and returns back to A with a uniform speed of 56 km per hour. Find the average speed of train during the whole journey.

A. 60 km/hr

B. 30.5 km/hr

C. 57 km/hr

D. 67.2 km/hr

Question 508

The average of 50 numbers is 30. If two numbers, 35 and 40 are discarded, then the average of the remaining numbers is nearly:

A. 28.32

B. 29.68

C. 28.78

D. 29.27

Question 509

The average score of a cricketer for ten matches is 38.9 runs. If the average for the first six matches is 42, then find the average for the last four matches.

A. 33.25

B. 33.5

C. 34.25

D. 35

Question 510

A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning.

A. 40

B. 39

C. 52

D. 55

Question 511

There were 35 students in a hostel. Due to the admission of 7 new students the expenses of the mess were increased by Rs.42 per day while the average expenditure per head diminished by Re 1. What was the original expenditure of the mess?

A. Rs. 450

B. Rs. 320

C. Rs. 550

D. Rs. 420

Question 512

Nine persons went to a hotel for taking their meals. Eight of them spent Rs. 12 each on their meals and the ninth spent Rs. 8 more than the average expenditure of all the nine. What was the total money spent by them.

A. Rs. 115

B. Rs. 116

C. Rs. 117

D. Rs. 118

Question 513

David obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, mathematics, physics, chemistry and biology. What are his average marks?

A. 65

B. 69

C. 75

D. None of these

Question 514

The average of runs of a cricket player of 10 innings was 32. How many runes must be made in his next innings so as to increase his average of runs by 4?

A. 72

B. 74

C. 70

D. 76

Question 515

There are two sections A and B of a class, consisting of 36 and 44 students respectively. If the average weight of section A is 40kg and that of section B is 35kg, find the average weight of the whole class.

A. 30 kg.

B. 35 kg.

C. 42.5 kg.

D. 37.25 kg.

Question 516

Distance between two stations A and B is 778km. A train covers the journey from A to B at 84km per hour and returns back to A with a uniform speed of 56km per hour. Find the average speed of train during the whole journey.

A. 60 km/hr

B. 30.5 km/hr

C. 57 km/hr

D. 67.2 km/hr

Question 517

Nine persons went to a hotel for taking their meals. Eight of them spent Rs.12 each on their meals and the ninth spent Rs.8 more than the average expenditure of all the nine. What was the total money spent by them.

A. Rs. 115

B. Rs. 116

C. Rs. 117

D. Rs. 118

Question 518

The average wages of a worker during a fortnight comprising 15 consecutive working days was Rs.90 per day. During the first 7 days, his average wages was Rs.87/day and the average wages during the last 7 days was Rs.92 /day. What was his wage on the 8th day?

A. 83

B. 92

C. 90

D. 97

Question 519

The average temperature on Wednesday, Thursday and Friday was 25°. The average temperature on Thursday, Friday and Saturday was 24°. If the temperature on Saturday was 27°, what was the temperature on Wednesday?

A. 24°

B. 21°

C. 27°

D. 30°

Question 520

When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students?

A. 57

B. 56.8

C. 58.2

D. 52.2

Question 521

The difference between two angles of a triangle is 24°. The average of the same two angles is 54°. Which one of the following is the value of the greatest angle of the triangle?

A. 45°

B. 60°

C. 66°

D. 72°

Question 522

The average age of a family of 5 members is 20 years. If the age of the youngest member be 10 years then what was the average age of the family at the time of the birth of the youngest member?

A. 13.5

B. 14

C. 15

D. 12.5

Question 523

Which one of the following numbers can be removed from the set S = {0, 2, 4, 5, 9} without changing the average of set S?

A. 0

B. 2

C. 4

D. 5

Question 524

Average cost of 5 apples and 4 mangoes is Rs. 36. The average cost of 7 apples and 8 mangoes is Rs. 48. Find the total cost of 24 apples and 24 mangoes.

A. 1044

B. 2088

C. 720

D. 3240

Question 525

Average of ten positive numbers is x. If each number is increased by 10%, then x :

A. remains unchanged

B. may decrease

C. may increase

D. is increased by 10%

Question 526

The average price of 10 books is Rs.12 while the average price of 8 of these books is Rs. 11.75. Of the remaining two books, if the price of one book is 60% more than the price of the other, what is the price of each of these two books?

A. Rs. 5, Rs.7.50

B. Rs. 8, Rs. 12

C. Rs. 10, Rs. 16

D. Rs. 12, Rs. 14

Question 527

Mean of 10 numbers is 30. Later on it was observed that numbers 15, 23 are wrongly taken as 51, 32. The correct mean is :

A. 25.5

B. 32

C. 30

D. 34.5

Question 528

Out of four numbers the average of the first three is 16 and that of the last three is 15. If the last number is 20, than first number is :

A. 25

B. 21

C. 23

D. 28

Question 529

Mukesh has twice as much money as Soham. Soham has 50% more money than Pankaj. If the average money with them is Rs. 110, then Mukesh has :

A. Rs. 155

B. Rs. 160

C. Rs. 180

D. Rs. 175

Question 530

The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5°C. If the mean of the whole week is 25.2°C then the temperature of the 4th day is :

A. 25°C

B. 25.2°C

C. 25.6°C

D. 25.5°C

Question 531

The average weight of 3 men, A, B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E whose weight is 3 kg more than that of D, replaces A then the average weight of B, C, D and E becomes 79 kg. What is the weight of A ?

A. 70 kg

B. 72 kg

C. 75 kg

D. 80 kg

Question 532

An elevator can carry maximum of 16 passengers with an average weight of 80 kg. However, four boys more than the maximum carrying capacity of the elevator entered it making the average weight as 86 kg and overloading the elevator. What is the average weight of those four boys ?

A. 112 kg

B. 108 kg

C. 110 kg

D. 98 kg

Question 533

Average weight of 25 students of a class is 50 kg. If the weight of the class teacher is included , the average is increased by 1 kg. The weight of the teacher is ?

A. 76 kg

B. 77 kg

C. 74 kg

D. 75 kg

Question 534

The mean of 100 items was 46. Later on it was discovered that an item 16 was misread as 61 and another item 43 was misread as 34. It was also found that the number of item was 90 and not 100. Then what is the correct mean ?

A. 50

B. 50.7

C. 52

D. 52.7

Question 535

The average of four consecutive even numbers is 15. The 2nd highest number is :

A. 12

B. 18

C. 14

D. 16

Question 536

The average of runs scored by a cricketer in his 99 innings is 99. How many runs will he have to score to his 100th innings so that his average of runs in 100 innings will become 100 ?

A. 100

B. 99

C. 199

D. 101

Question 537

A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the average score for the team would have been 84. The number of points the team scored was :

A. 672

B. 665

C. 645

D. 588

Question 538

What is the average of the first six (positive) odd number each of which is divisible by 7?

A. 42

B. 43

C. 47

D. 49

Question 539

A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is :

A. 130

B. 128

C. 70

D. 68

Question 540

There are 30 students in a class. The average age of first 10 students is 12.5 years. The average age of the remaining 20 students is 13.1 years. The average age (in years) of the students of the whole class is :

A. 12.5 years

B. 12.7 years

C. 12.8 years

D. 12.9 years

Question 541

The average of marks in Mathematics for 5 students was found to do 50. Later, it was discovered that in the case of one student the marks 48 were misread as 84. The correct average is :

A. 40.2

B. 40.8

C. 42.8

D. 48.2

Question 542

The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85. The average marks of the remaining students is :

A. 35

B. 45

C. 55

D. 65

Question 543

In the first 10 overs of a cricket game, the run rate was only 3.2. The run rate in the remaining 40 overs to reach the target of 282 run is :

A. 6.4

B. 6.3

C. 6.25

D. 6.5

Question 544

The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is :

A. 161

B. 162

C. 163

D. 164

Question 545

In an exam, the average marks obtained by Jhon in English, Math, Hindi and Drawing were 50. His average mark in Maths, Science, Social Studies and Craft were 70. If the average mark in all seven subjects is 58, his score in Maths was -

A. 50

B. 52

C. 60

D. 74

Question 546

30 pens and 75 pencils altogether were purchased for Rs. 510. If the average price of a pencil was Rs. 2, what was the average price of a pen ?

A. Rs. 9

B. Rs. 10

C. Rs. 11

D. Rs. 12

Question 547

The average age of 30 students of a class is 14 years 4 months. After admission of 5 new students in the class the average becomes 13 years 9 months. The youngest one of the five new students is 9 years 11 months old. The average age of the remaining 4 new students is :

A. 10 years 4 months

B. 12 years 4 months

C. 11 years 2 months

D. 13 years 6 months

Question 548

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is :

A. 40 years

B. 35 years

C. 50 years

D. None of the options

Question 549

The average of 10 items was found to be 80 but while calculating, one of the items was counted as 60 instead of 50. Then the correct average would have been :

A. 69

B. 79.25

C. 79

D. 79.5

Question 550

The average age of 24 boys and their teacher is 15 years. When the teacher's age is excluded, the average age decreases by 1 year. The age of the teacher is :

A. 38 years

B. 39 years

C. 40 years

D. 41 years

Question 551

The average age of four boys A, B, C and D is 5 years and the average age A, B, D, E is 6 years. C is 8 years old. The age of E is (in years) :

A. 12

B. 13

C. 14

D. 15

Question 552

A librarian purchased 50 storybooks for his library. But he saw that he could get 14 books more by spending Rs. 76 more but per book average becomes Rs. 1 less. The average price (in Rs.) of each book he bought, was :

A. 15

B. 25

C. 20

D. 10

Question 553

A student finds the average of 10, 2 digits numbers. If the digits of one of the numbers interchanged, the average increases by 3.6. The difference between the digits of the 2 digits number is :

A. 4

B. 3

C. 2

D. 5

Question 554

The mean of 100 observations was calculated as 40. It was founder later on that one of the observation was misread as 83 instead of 53. The correct mean is :

A. 39

B. 39.7

C. 40.3

D. 42.7

Question 555

Sachin Tendulkar has a certain average for 11 innings. In the 12th innings he scores 120 runs and thereby increases his average by 5 runs. His new average is :

A. 60

B. 62

C. 65

D. 66

Question 556

The average age of husband and his wife was 23 years at the time of their marriage. After five tears they have a one-year old child. The average age of the family of three, when the child was born, was-

A. 23 years

B. 24 years

C. 18 years

D. 20 years

Question 557

The present age of a father is 3 years more than three times the age of his son. Three years hence, father's age will be 10 years more than twice the age of the son. The father's age is :

A. 33 years

B. 39 years

C. 45 years

D. 40 years

Question 558

A set A consists of integers 27, 28, 30 and 33. If integer k is included in the set, the average of set A will increase by 30%. What is the value of integer k ?

A. 68

B. 79

C. 73.75

D. 75.25

Question 559

The average age of a family with 5 members is 28. If one of the 5 members of age 20 is excluded the average age of the family becomes -

A. 25

B. 20

C. 30

D. 24

Question 560

The average age of 40 students of class is 18 years. When 20 new students are admitted to the same class, the average age of the students of the class is increased by 6 months. The average age of newly admitted students is ?

A. 19 years

B. 19 years 6 months

C. 20 years

D. 20 years 6 months

Question 561

The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new average becomes 47. The new observation is :

A. 58

B. 56

C. 50

D. 46

Question 562

The average pocket money of 3 friend A, B, C is Rs. 80 in a particular month. If B spends double and C spends triple of what A spends during that month and if the average of their unspent pocket money is Rs. 60, then A spends (in Rs.)-

A. Rs. 10

B. Rs. 20

C. Rs. 30

D. Rs. 40

Question 563

The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg.)

A. 55 kg

B. 57 kg

C. 66 kg

D. 56 kg

Question 564

The average age of group of 20 girls is 15 years and that of another group of 25 boys it is 24 years. The average age of the two groups mixed together is :

A. 19.5 yearas

B. 20 years

C. 21 yearas

D. 21.5 years

Question 565

The average of nine number is 50. The average of first five numbers is 54 and that of the last three numbers is 52. Then the sixth number is :

A. 30

B. 34

C. 24

D. 44

Question 566

Five years ago, the average age of P and Q was 25. The average age of P, Q and R today is 25. Age of R after 5 years will be :

A. 15 years

B. 20 years

C. 40 years

D. 35 years

Question 567

From a class of 42 boys, a boy aged 10 years goes away and in his place, a new boy is admitted. If on account of this change, the average age of the boys in that class increases by 2 months, the age of the newcomer is :

A. 19 years

B. 17 years

C. 10 years 6 months

D. 12 years 2 months

Question 568

The average age of 30 students is 9 years. If the age of their teacher is included, the average age becomes 10 years. The age of the teacher (in years) is :

A. 27

B. 31

C. 35

D. 40

Question 569

The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is 7 years. The average age of all the boys in the class becomes:

A. 8.2 years

B. 9.5 years

C. 12.5 years

D. 11 years

Question 570

The average of six numbers is 3.95. The average of two of them is 3.4, while the average of the other two is 3.85. The average of the remaining two numbers is :

A. 4.6

B. 4.8

C. 4.5

D. 4.7

Question 571

If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is :

A. 10

B. 12

C. 14

D. 16

Question 572

3 years age, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is same today. The present age of the baby is :

A. 1 years

B. 1$$\frac{1}{2}$$ years

C. 2 years

D. 3 years

Question 573

If the average of 5 consecutive integers is x then, find the average of next to next 5 consecutive integers.

A. x + 5

B. x - 5

C. x + 10

D. x + 25

Question 574

The average age of P, Q and R is 15 years more than R's age. If the total age of P and Q together is 39 years, then R's age is ?

A. 12 years

B. 24 years

C. 16 years

D. 14 years

Question 575

Find the average of 1.11, 0.01, 0.101, 0.001, 0.11 = ?

A. 0.2664

B. 0.2554

C. 0.1264

D. 0.1165

Question 576

The average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. The correct average of the observation is -

A. 28

B. 42

C. 32

D. 45

Question 577

Out of 20 boys, 6 are each of 1 m 15 cm height, 8 are of 1 m 10 cm and rest of 1 m 12 cm. The average height of all of them is :

A. 1 m 12.1 cm

B. 1 m 21.1 cm

C. 1 m 21 cm

D. 1 m 12 cm

Question 578

The average of the largest and smallest 3 digits numbers formed by 0, 2 and 4 would be :

A. 312

B. 222

C. 213

D. 303

Question 579

The average of five numbers is 7. If three new numbers would be added, then the new average comes out to be 8.5. What is the average of those three new numbers ?

A. 9

B. 10.5

C. 11

D. 11.5

Question 580

The average monthly income of A and B is Rs. 14000, that of B and C is Rs. 15600 and A and C is Rs. 14400. The monthly income of C is :

A. Rs. 16000

B. Rs. 15000

C. Rs. 14000

D. Rs. 15500

Question 581

The average of 25 observations is 13. It was later found that an observation 73 was wrongly entered as 48. The new average is -

A. 12.6

B. 14

C. 15

D. 13.8

Question 582

A fruit seller sold big, medium and small sizes apples of Rs. 15, Rs. 10 and Rs. 5, respectively. The total number of apples sold were in the ratio 3 : 2 : 5. Find the average cost of an apple.

A. 8

B. 10

C. 9

D. 7

Question 583

Average age of 6 sons of a family is 8 years. Average age of sons together with their parents is 22 years. If the father is older than the mother by 8 years, the age of mother (in years) is -

A. 44

B. 52

C. 60

D. 68

Question 584

In a class, there are 40 boys and their average age is 16 years. One boy, aged 17 years, leaving the class and another joining, the average age becomes 15.875 years The age of the new boy is :

A. 12 years

B. 14.5 years

C. 15 years

D. 17 years

Question 585

If average of 20 observations x1, x2, . . . . . x20 is y, then the average of x1 - 101, x2 - 101, x3 - 101, . . . . . x20 - 101 is :

A. y - 20

B. y - 101

C. 20y

D. 101y

Question 586

The average marks of 14 students was 71. It was later found that the marks of one of the student has been wrongly entered as 42 instead of 56 and another as 74 instead of 32. What is the correct average ?

A. 68

B. 71

C. 67

D. 69

Question 587

In a 20 over match, the required run rate to win is 7.2. If the run rate is 6 at the end of the 15th over, the required run rate to win the match is :

A. 1.2

B. 13.2

C. 10.8

D. 12

Question 588

The average age of 10 children is 9 years 9 months. The average of 9 children is 8 years 11 months. What is the age of the tenth child ?

A. 17 years 3 months

B. 18 years 4 months

C. 17 years 5 months

D. 18 years 3 months

Question 589

The average weight of 20 students in a class is increased by 0.75 kg when one student of 35 kg replaced by a new student. Weight of the new student (in kg) is :

A. 35

B. 40

C. 45

D. 50

Question 590

In a pre school, the average weight of 30 girls in a class among 50 students is 16 kg and that of the remaining students is 15.5 kg. What is the average weight of all the students in the class ?

A. 15.2 kg

B. 15.8 kg

C. 15.4 kg

D. 15.6 kg

Question 591

Out of nine persons, 8 persons spent Rs. 30 each for their meals. The ninth one spent Rs. 20 more than the average expenditure of all the nine. The total money spent by all of them was :

A. Rs. 260

B. Rs. 290

C. Rs. 292.50

D. Rs. 400.50

Question 592

A man had 7 children. When their average age was 12 years, a child aged 6 years died. Then average age of remaining six children is :

A. 13 years

B. 10 years

C. 11 years

D. 14 years

Question 593

In a class, the average score of girls in an examination is 73 and that of boys is 71. The average score for the whole class is 71.8. Find the percentage of girls :

A. 40%

B. 50%

C. 55%

D. 60%

Question 594

If the average of 6 consecutive even number is 25, the difference between the largest and the smallest number is :

A. 8

B. 10

C. 12

D. 14

Question 595

The sum of three consecutive even numbers is 28 more than the average of these three number. Then the smallest of these number is -

A. 6

B. 16

C. 12

D. 14

Question 596

A man purchased 7 bags of rice at the rate of Rs. 800 each, 8 bags of rice at Rs. 1000 each and 5 bags of rice at the rate of Rs. 1200 each. What is the average cost of one bag of rice ?

A. Rs. 1000

B. Rs. 980

C. Rs. 1120

D. Rs. 1050

Question 597

The average age of 9 students and their teacher is 16 years. The average age of the first four students is 19 years and that of the last five is 10 years. The teacher's age is -

A. 36 years

B. 34 years

C. 30 years

D. 28 years

Question 598

Total weekly emoluments of the workers of a factory is Rs. 1534. Average weekly emolument of a worker is Rs. 118. The number of workers in the factory is :

A. 16

B. 14

C. 13

D. 12

Question 599

B was born when A was 4 years 7 months old and C was born when B was 3 years 4 months old. When C was 5 years 2 months old, then their average age was :

A. 8 years 9 months

B. 7 years 3 months

C. 8 years 7 months

D. 8 years 11 months

Question 600

The batting average for 40 innings of a cricket player is 50 runs. His highest score exceeds his lowest score by 172 runs. If these two innings are excluded, the average of the remaining 38 innings is 48 runs. The highest score of the player is -

A. 165

B. 170

C. 172

D. 174

Question 601

The average of some natural numbers is 15. If 30 is added to the first number and 5 is subtracted from the last number the average becomes 17.5 then the number of natural numbers is -

A. 20

B. 30

C. 15

D. 10

Question 602

A student finds the average of ten 2 digits numbers. While copying numbers, by mistake, he writes in number with its digits interchanged. As a result his answer is 1.8 less than the correct answer. The difference of digits of the number, in which he made mistake is ?

A. 2

B. 3

C. 4

D. 6

Question 603

The average marks obtained by 22 candidate in an examination are 45. The average marks of the first 10 candidates is 55 and those of the last eleven is 40. The number of marks obtained by the eleventh candidate is ?

A. 45

B. 0

C. 50

D. 47.5

Question 604

Average of first five odd multiples of 3 is -

A. 12

B. 16

C. 15

D. 21

Question 605

The average of 50 numbers is 38. If two numbers, namely 45 and 55 are discarded, the average of the remaining numbers is ?

A. 37.5

B. 37.9

C. 36.5

D. 37

Question 606

The average of a collection of 20 measurements was calculated to tb 56 cm. But later it was found that a mistake had occurred in one of the measurement which was recorded as 64 cm., but should have been 61 cm. The correct average must be -

A. 53 cm

B. 54.5 cm

C. 55.85 cm

D. 56.15 cm

Question 607

A cricketer whose bowling average is 24.85 runs per wickets, takes 5 wickets for 52 runs in next inning and thereby decreases his average by 0.85. The number of wickets taken by him till the last match was :

A. 75

B. 85

C. 80

D. 96

Question 608

A library has an average number of 510 visitors on sunday and 240 on other days. The average number of visitors per day in a month of 30 day beginning with sunday is -

A. 285

B. 295

C. 300

D. 290

Question 609

There are two groups A and B of a class, consisting of 42 and 28 students respectively. If the average weight of group A is 25 kg and that of group B is 40 kg, find the average weight of the whole class.

A. 69 kg

B. 31 kg

C. 70 kg

D. 30 kg

Question 610

The arithmetic mean of the following numbers : 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6 and 7, 7, 7, 7, 7, 7, 7 is -

A. 4

B. 5

C. 14

D. 20

Question 611

The average weight of 15 students in a class increases by 1.5 kg when one of the students weighing 40 kg is replaced by a new student. What is the weight (in kg) of the new student ?

A. 64.5 kg

B. 56 kg

C. 60 kg

D. 62.5 kg

Question 612

A cricketer has a mean score of 60 runs in 10 innings. Find out how many runs are to be scored in the eleventh innings to raise the mean score to 62 ?

A. 83

B. 82

C. 80

D. 81

Question 613

Eight consecutive numbers are given. If the average of the two numbers that appear in the middle is 6, then the sum of the eight given numbers is :

A. 54

B. 64

C. 36

D. 48

Question 614

The average temperature on Tuesday, Wednesday, and Thursday was 41 degrees, and on Wednesday, Thursday and Friday was 40 degrees. If on Friday it was exactly 39 degrees, then what was the temperature on Tuesday?

A. 42 degrees

B. 46 degrees

C. 23 degrees

D. 26 degrees

Question 615

The average of six numbers is 32. If each of first three numbers is increased by 2 and each of the remaining three numbers is decreased by 4, then the new average is ?

A. 35

B. 34

C. 31

D. 30

Question 616

The average of all the odd integers between 2 an 22 is ?

A. 13

B. 12

C. 11

D. 14

Question 617

The average weight of five persons sitting in a boat is 38 kg. The average weight of the boat and the persons sitting in the boat is 52 kg. What is the weight of the boat ?

A. 228 kg

B. 122 kg

C. 232 kg

D. 242 kg

Question 618

The average expenditure of a man for the first five months Rs. 1200 and for the next seven months is Rs. 1300. If he saves Rs. 2900 in that years, his monthly average income is -

A. Rs. 1600

B. Rs. 1700

C. Rs. 1400

D. Rs. 1500

Question 619

The average age of mother and her six children is 12 years, which is reduced by 5 years if the age of mother is excluded. The age of the mother (in years) is :

A. 40

B. 50

C. 42

D. 48

Question 620

There are 50 students in a class. Their average weight is 45 kg. When one student leaves the class the average weight reduces by 100 g. What is the weight of the student who left the class ?

A. 45 kg.

B. 47.9 kg.

C. 49.9 kg.

D. 50.1 kg.

Question 621

The mean of 20 items is 55. If two items 45 and 30 are removed, the new mean of the remaining items is :

A. 65.1

B. 65.3

C. 56.9

D. 56

Question 622

The average weight of a group of 20 boys was calculated to be 89.4 kg and it was later discovered that one weight was misread as 78 kg instead of 87 kg. The correct average weight is -

A. 88.95kg

B. 89.25 kg

C. 89.55 kg

D. 89.85 kg

Question 623

A batsman in his 12th innings makes a score of 63 runs and there by increases his average score by 2. What is his average after the 12th innings ?

A. 13

B. 39

C. 41

D. 87

Question 624

Out of 10 teachers of a school, one teacher retires and in place of him a new teacher 25 years old joins. As a result of it average age of the teachers reduces by 3 years. Age of the retired teacher (in years) is -

A. 55

B. 65

C. 45

D. 75

Question 625

The average of the first 100 positive integers is -

A. 100

B. 51

C. 50.5

D. 49.5

Question 626

The average age of 11 players of a cricket team decreases by 2 months when two new players are included in the team replacing two players of age 17 years and 20 years. The average age of new players is :

A. 17 years 1 month

B. 17 years 7 month

C. 17 years 11 month

D. 18 years 3 month

Question 627

The mean of 50 numbers is 30. Later it was discovered that two entries were wrongly entered as 82 and 13 instead of 28 and 31. Find the correct mean.

A. 36.12

B. 30.66

C. 29.28

D. 38.21

Question 628

The average age of 30 boys in a class in 15 years. One boy, aged 20 years, left the class, but two new boys came in his place whose age differs by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger newcomer is :

A. 20 years

B. 15 years

C. 10 years

D. 8 years

Question 629

The average age of a class of 39 students is 15 years. If the age of the teacher is included, then the average increases by 3 months. Find the age of the teacher.

A. 30 years

B. 25 years

C. 35 years

D. 40 years

Question 630

The mean of 9 observation is 16. One more observation is included and the new mean becomes 17. The 10th observation is :

A. 9

B. 16

C. 26

D. 30

Question 631

The average weight of first 11 persons among 12 persons is 95 kg. The weight of 12th person is 33 kg more than the average weight of all the 12 persons. The weight of the 12th person is :

A. 128.75

B. 131

C. 128

D. 97.45

Question 632

In the afternoon, a student read 100 pages at the rate of 60 pages per hour. In the evening, when she was tired, she read 100 more pages at the rate of 40 pages per hour. What was her average rate of reading the pages per hours ?

A. 60

B. 70

C. 48

D. 50

Question 633

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the average marks of all the students is :

A. 54.68

B. 53.33

C. 55

D. None of these

Question 634

Find the average of cubes of first 49 positive integers.

A. 30625

B. 1225

C. 30125

D. 6235

Question 635

In a family of 5 members, the average age at present is 33 years. The youngest member is 9 years old. The average age of the family just before the birth of the youngest members was :

A. 30 years

B. 29 years

C. 25 years

D. 24 years

Question 636

A man spends his three months income in four month time. If his monthly income is Rs. 1000 then his annual savings is ?

A. Rs. 3000

B. Rs. 9000

C. Rs. 4000

D. Rs. 6000

Question 637

Average weight of 25 persons is increased by 1 kg when one person weighing 60 kg is replaced by a new person. Weight of new the person is-

A. 50 kg

B. 61 kg

C. 86 kg

D. 85 kg

Question 638

The average age of Ram and his two children is 17 years and the average age of Ram's wife and the same children is 16 years. If the age of Ram is 33 years, the age of his wife is (in years) :

A. 31 years

B. 32 years

C. 35 years

D. 30 years

Question 639

The average weight of 12 parcels is 1.8 kg. Addition of another new parcel reduces the average weight by 50 gm. What is the weight of the new parcel ?

A. 1.50 kg

B. 1.10 kg

C. 1.15 kg

D. 1.01 kg

Question 640

Six tables and twelve chairs were bought for Rs. 7800. If the average price of a table is Rs. 750, then the average price of a chair would be :

A. Rs. 250

B. Rs. 275

C. Rs. 150

D. Rs. 175

Question 641

The average of six numbers is 20. If one number is removed, the average becomes 15. What is the number removed ?

A. 5

B. 35

C. 112

D. 45

Question 642

The average age of four brothers is 12 years. If the age of their mother is also included, the average is increased by 5 years. The age of the mother (in years) is :

A. 37 years

B. 43 years

C. 48 years

D. 53 years

Question 643

The average of 50 numbers is 38. If the numbers 45 and 55 are discarded, then the average of the remaining numbers is-

A. 36.5

B. 37

C. 37.5

D. 37.52

Question 644

Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56, then difference of first and third numbers is

A. 12

B. 20

C. 24

D. 48

Question 645

The average price of three items of furniture is Rs. 15000. If their prices are in the ratio 3 : 5 : 7, the price of the cheapest item is-

A. Rs. 9000

B. Rs. 15000

C. Rs. 18000

D. Rs. 21000

Question 646

A school has 4 sections of chemistry in Class X having 40, 35, 45 and 42 students. The mean marks obtained in Chemistry test are 50, 60, 55 and 45 respectively for the 4 sections. Determine the overall average of marks per student.

A. 50.25

B. 51.25

C. 52.25

D. 53.25

Question 647

The mean of 5 observations is 60, the mean of 10 observations is 30 and the mean of 15 observations is 20. The mean of all the 30 observations is-

A. 20

B. 25

C. 30

D. 40

Question 648

In a class there are 32 boys and 28 girls. The average age of the boys in the class is 14 years and the average age of the girls in the class 13 years. What is the average age of the whole class (rounded to two digits after decimal) ?

A. 12.51

B. 13.42

C. 13.5

D. 13.53

Question 649

The average mark of student in 4 subjects is 75. If the student obtained 80 marks in the fifth subject, then the new average is-

A. 72.5

B. 76

C. 77

D. 77.5

Question 650

The average of 7 consecutive numbers is 20. The largest of these numbers is-

A. 20

B. 22

C. 23

D. 24

Question 651

Of four numbers whose average is 60, the first is one-fourth of the sum of the last three. The first number is -

A. 15

B. 42

C. 45

D. 48

Question 652

The average of odd numbers up to 100 is

A. 49

B. 50.5

C. 50

D. 100

Question 653

In a group of 120 people, one-fifth are men, one-fourth are women and the rest children. The average age of women is five-sixth of the average age of men. Average age of children is one-fourth of the average age of men. If average age of men is 60 years, what is the average age of the group?

A. 32.75 yeras

B. 38.45 years

C. 45.25 years

D. 50.5 years

Question 654

The average of ten numbers is 7. If each number is multiplied by 12, then the average of the new set of numbers is :

A. 7

B. 19

C. 82

D. 84

Question 655

While calculating the average of a batsman as 36 in 100 matches that he played, one of the scores 90 was incorrectly noted as 40. The percentage error is-

A. 0.50%

B. 1.21%

C. 1.34%

D. 1.36%

Question 656

In an examination, a pupil’s average mark was 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination?

A. 8

B. 9

C. 10

D. 11

Question 657

In a one-day cricket match the captain of one of the teams scored 30 runs more than the average runs scored by the remaining six batsman of that team who batted in the match. If the total runs scored by all the batsmen of that team were 310, how many runs did the captain score?

A. 50

B. 60

C. 70

D. Cannot be determined

Question 658

The average price of 10 books is Rs. 12 while the average price of 8 of these books is Rs. 11.75. Of the remaining two books, if the price of one book is 60% more than the price of the other, what is the price of each of these two books?

A. Rs. 5, Rs. 7.50

B. Rs. 8, Rs. 12

C. Rs. 10, Rs. 16

D. Rs. 12, Rs. 14

Question 659

The average age of 30 students in a class is 15 years. If 6 students of this class have the average age of 16 years, then the average age of the remaining 24 students would be-

A. 14 yrs

B. 14 yrs 3 mths

C. 14 yrs 6 mths

D. 14 yrs 9 mths

Question 660

Of the four numbers, the first is twice the second, the second is one-third of the third and the third is 5 times the fourth. The average of the numbers is 24.75. The largest of these numbers is-

A. 9

B. 25

C. 30

D. None of these

Question 661

A car owner buys petrol at Rs. 17, Rs. 19 and Rs. 20 per litre for three consecutive years. Compute the average cost per litre, if he spends Rs 6460 per year.

A. Rs. 18.49

B. Rs. 18.58

C. Rs. 19.20

D. Rs. 21.66

Question 662

The average of five consecutive numbers is x. If the next two numbers are included, how shall the average vary?

A. It shall increase by 1

B. It shall remain the same

C. It shall increase by 1.4

D. It shall increase by 2

Question 663

In a certain factory there are five workers A, B, C, D and E. A can complete a work in 4 minutes, B in 5 minutes, C in 6 minutes, D in 10 minutes and E in 12 minutes. The average number of units of work completed per worker per minute will be-

A. 0.16

B. 0.172

C. 0.8

D. 0.87

Question 664

The average expenditure of a man for the first five months of a year is Rs. 5000 and for the next seven months it is Rs. 5400. He saves Rs. 2300 during the year. His average monthly income is-

A. Rs. 5425

B. Rs. 5446

C. Rs. 5500

D. Rs. 5600

Question 665

The average weight of 16 boys in a class is 50.25 kgs and that of the remaining 8 boys is 45.15 kgs. Find the average weight of all the boys in the class.

A. 47.55 kgs

B. 48 kgs

C. 48.55 kgs

D. 49.25 kgs

Question 666

A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is-

A. 250

B. 276

C. 280

D. 285

Question 667

The sum of the three consecutive even numbers is 44 more than the average of these numbers. Which of the following is the third largest of these numbers?

A. 16

B. 18

C. 24

D. Cannot be determined

Question 668

The average of five consecutive odd numbers is 95. What is the fourth number in the descending order?

A. 91

B. 95

C. 97

D. None of the above

Question 669

The average of two numbers is 6.5 and square root of their product is 6. What are the numbers?

A. 11 and 2

B. 8 and 5

C. 9 and 4

D. 10 and 3

Question 670

A, B, C and D are four consecutive even numbers respectively and their average is 65. What is the product of A and D?

A. 3968

B. 4092

C. 4216

D. 4352

Question 671

In Arun’s opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun’s weight is greater is that 60 kg but less than 70 kg. His mother’s view is that his weight cannot be greater than 68 kg. If all of them are correct in their estimation, what is the average of different probable weights of Arun?

A. 67 kg

B. 68 kg

C. 69 kg

D. Data inadequate

Question 672

The mean of the first ten even natural number is-

A. 0

B. 10

C. 11

D. 12

Question 673

The arithmetic mean of first 11 natural numbers is

A. 5

B. 5.5

C. 6

D. 6.5

Question 674

The total marks obtained by a student in Physics, Chemistry and Mathematics together is 120 more than the marks obtained by him in Chemistry. What is the average marks obtained by him in Physics and Mathematics together?

A. 40

B. 60

C. 120

D. Cannot be determined

Question 675

A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found mean to be 12. What should be the number in place of x?

A. 3

B. 7

C. 17

D. 31

Question 676

If the mean of a, b, c, is M and ab + bc + ca = 0, then the mean of a2, b2, c2 is -

A. M2

B. 3M2

C. 6M2

D. 9M2

Question 677

The average of 2, 7, 6 and x is 5 and the average of 18, 1, 6, x and y is 10. What is the value of y?

A. 5

B. 10

C. 20

D. 30

Question 678

The average of x1, x2, x3 and x4 is 16. Half the sum of x2, x3, x4 is 23. What is the value of x1?

A. 17

B. 18

C. 19

D. 20

Question 679

Company C sells a line of 25 products with an average retail price of Rs. 1200. If none of these products sells for less than Rs. 420 and exactly 10 of the products sell for less than Rs. 1000, then what is the greatest possible selling price of the most expensive product?

A. Rs. 2600

B. Rs. 3900

C. Rs. 7800

D. Rs. 11800

Question 680

If the mean of 5 observations x, x + 2, x + 4, x + 6 and x + 8 is 11, then the mean of the last three observations is-

A. 11

B. 13

C. 15

D. 17

Question 681

The mean of 12, 22, 32, 42, 52, 62, 72 is -

A. 10

B. 20

C. 30

D. 40

Question 682

Total of Arun’s marks in Sanskrit and Mathematics together are 80 more than his marks in Science. His average marks in the three subjects are 100. What are his marks in Science?

A. 80

B. 110

C. 120

D. Data inadequate

Question 683

The average of the two-digit numbers, which remain the same when the digits interchange their positions, is-

A. 33

B. 44

C. 55

D. 66

Question 684

The average of a non-zero number and its square is 5 times the number. The number is-

A. 9

B. 17

C. 29

D. 295

Question 685

The average age of a cricket team of 11 players is the same as it was 3 years back because 3 of the players whose current average age of 33 years are replaced by 3 youngsters. The average age of the new comers is :

A. 23 years

B. 21 years

C. 22 years

D. 20 years

Question 686

The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is ?

A. 25

B. 27

C. 30

D. 35

Question 687

If the average weight of 6 students is 50 kg. If two student of average weight of 51 kg are added and two other students of average weight of 55 kg are also added then the average weight of all the students is :

A. 61 kg

B. 51.5 kg

C. 52 kg

D. 51.2 kg

Question 688

The average of the squares of first ten natural numbers is-

A. 35.5

B. 36

C. 37.5

D. 38.5

Question 689

The average of 11 results is 50. If the average of the first six results is 49 and that of the last six is 52, the sixth number is -

A. 48

B. 50

C. 52

D. 56

Question 690

A man bought 13 articles at Rs. 70 each, 15 at Rs. 60 each and 12 at Rs. 65 each. The average price per article is -

A. Rs. 60.25

B. Rs. 64.75

C. Rs. 65.75

D. Rs. 62.25

Question 691

The average salary, per head, of all the workers of an institution is Rs. 60. The average salary of 12 officers is Rs. 400; the average salary, per head, of the rest is Rs. 56. The total number of workers in the institution is -

A. 1030

B. 1035

C. 1032

D. 1020

Question 692

The average of the three numbers x, y and z is 45. x is greater than the average of y and z by 9. The average of y and z is greater than y by 2. Then the difference of x and z is :

A. 3

B. 5

C. 7

D. 8

Question 693

4 boys and 3 girls spent Rs. 120 on an average, of which boys spent Rs. 150 on the average. The the average amount spent by the girls is-

A. Rs. 80

B. Rs. 60

C. Rs. 90

D. Rs. 100

Question 694

If the difference between the average of x, y and y, z is 12, then the difference between x and z is :

A. 6

B. 48

C. 24

D. 12

Question 695

In an examination average marks obtained by the girls of a class is 85 and the average marks obtained by the boys of the same class is 87. If the girls and boys are in the ratio 4 : 5, average marks of the whole class (approx.) is closest to :

A. 86.5

B. 85.9

C. 86.4

D. 86.1

Question 696

The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average is increased by 0.2 year. The average age of the new students is :

A. 15.2 years

B. 16 years

C. 16.2 years

D. 16.4 years

Question 697

The average of 20 numbers is 12. The average of the first 12 numbers is 11 and that of the next 7 numbers is 10. The last number is ?

A. 40

B. 38

C. 48

D. 50

Question 698

The average of seven numbers is 18. If one of the numbers is 17 and if it is replaced by 31, then the average becomes :

A. 21.5

B. 19.5

C. 20

D. 21

Question 699

The average daily income of 7 men, 11 women and 2 boys is Rs. 257.50. If the average daily income of the men is Rs. 10 more than that of women and the average daily income of the women is Rs. 10 more than that of boys the average daily income of a man is -

A. Rs. 277.50

B. Rs. 250

C. Rs. 265

D. Rs. 257

Question 700

The average age of 11 players of a cricket team is increased by 2 months when two of them aged 18 years and 20 years are replaced by two new players. The average age of the new players is :

A. 19 years 1 month

B. 19 years 6 months

C. 19 years 11 months

D. 19 years 5 months