Probablity MCQ Questions And Answers - Mathematics Class 12

Question 1

Probablity equal to the?

A. ratio of the number of favourable results and the total number of input
B. ratio of the number of favourable outcome and the total number of outcomes
C. ratio of the number of favourable results and the total number of favourable results
D. ratio of the number of favourable results and the total number of outcomes

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Question 2

The probability formula is defined as the likelihood of an event to happen.

A. Yes
B. No
C. Can be yes or no
D. Can not say

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Question 3

P(S|F) = P(F|F) = ?

A. 0
B. 1
C. infinite
D. random number

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Question 4

If P (A) = 0.8, P (B) = 0.5 and P (B|A) = 0.4, find:P (A ∩ B)

A. 0.64
B. 0.98
C. 0.32
D. 0.4

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Question 5

P(E|F) = P(E ∩ F)/P(F), provided P(F) can not be?

A. 1
B. 0
C. Both A and B
D. Can not say

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Question 6

Let A and B be two given events such that P(A) = 0.6, P(B) = 0.2 and P(A/B) = 0.5. Then P(A'/B') is

A. (1/10)
B. (3/10)
C. (3/8)
D. (6/7)

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Question 7

If P(A ∩ B) = 70% and P(B) = 85%, then P(A/B) is equal to

A. (14/17)
B. (17/20)
C. (7/8)
D. (1/8)

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Question 8

Two dice are thrown once. If it is known that the sum of the numbers on the dice was less than 6 the probability of getting a sum 3 is

A. (1/18)
B. (5/18)
C. (2/5)
D. (1/5)

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Question 9

Three balls are drawn from a bag containing 2 red and 5 black balls, if the random variable X represents the number of red balls drawn, then X can take values

A. 0,1,2,3
B. 0,1,2
C. 0
D. 1,2

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Question 10

Conditional Probability is the likelihood of an event or outcome occurring based on the occurrence of a previous event or outcome.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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