Probability Class 12 MCQs Questions with Answers

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

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

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

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

5. If two events are independent, then

6. 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.

7. 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

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

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

10.

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

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

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

The value of k is

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

15.

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

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

18.

19.

20. 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?