Probability Class 12 MCQs Questions with Answers

1. If two events are independent, then

2. The conditional probability of an event E, given the occurrence of the event F

3.

4.

5. If P(a) = 0,4, P(b) = 0.8 and P(B|A) = 0.6 then P(A∪B) is equal to

6.

7. If A and B are two independent events, then the probability of occurrence of at least of A and B is given by

8. An experiment has 10 equally likely outcomes. Let A and B be two non-empty events of the experiment. A consists 4 outcomes, the number of outcomes that B must have so that A and B are independent is

9.

10. Which of the following conditions do Bernoulli trials satisfy?

11. For the following probability distribution, the standard deviation of the random variable X is

12. If a, b and c are all distinct and the

13. If the event A and B are independent, then P(A∩B) is equal to

14. The probability distribution of a discrete random variable X is given below:

The value of k is

15. An urn contains five balls. Two balls are drawn and found to be white. The probability that all the balls are white is:​

16. Two cards are drawn at random and without replacement from a pack of 52 playing cards. Find the probability that both the cards are black.

17. The probability of a man hitting a target is 1/4. How many times must he fire so that the probability of his hitting the target at least once is greater than 2/3?

18. Let E and F be events of a sample space S of an experiment, then P(E’/F) = ___

19. A pair of dice are rolled. The probability of obtaining an even prime number on each dice is

20. If A and B are two events and A ≠ Φ, B ≠ Φ, then