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probability MCQs

Practise focused probability questions with marked answers for exam preparation and subject revision.

probability Mcqs

1. If four coins are tossed, the probability of getting two heads and two tails is__________?
0

A. 5-Feb

B. 3/8

C. 5-Apr

D. 11-Jun

2. A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is___________?
0

A. 13-Feb

B. Jan-52

C. 13-Jan

D. 1/26

3. Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduate among them?
0

A. 6-Jan

B. 8-Mar

C. 8-May

D. 5/6

4. A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If three marbles are picked at random, what is the probability that they are all blue?
0

A. 4/455

B. 2/455

C. Jan-91

D. 1/455

5. A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If two marbles are picked at random, what is the probability that they are either blue or yellow?
0

A. 2/21

B. 21-Apr

C. 22-Mar

D. 14-Jan

6. If six persons sit in a row, then the probability that three particular persons are always together is____________?
0

A. 20-Jan

B. 10-Mar

C. 5-Apr

D. 1/5

7. If two dice are thrown together, the probability of getting an even number on one die and an odd number on the other is__________?
0

A. 4-Mar

B. 1/2

C. 5-Mar

D. 4-Jan

8. 10 books are placed at random in a shelf. The probability that a pair of books will always be together is_________?
0

A. 10-Sep

B. 1/5

C. 10-Jan

D. 10-Mar

9. Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is_____________?
0

A. 16/19

B. 2-Jan

C. 5-Apr

D. 17/20

10. A bag contains 7 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is -.
0

A. 5-Mar

B. 15-Aug

C. 5-Feb

D. 7/15

11. The probability that A speaks truth is 3/5 and that of B speaking truth is 4/7. What is the probability that they agree in stating the same fact?
0

A. 19/35

B. Dec-35

C. 18/35

D. 17/35

12. A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that at least one bulb is good.
0

A. 125/126

B. 1/126

C. Feb-63

D. Jun-63

13. What is probability of drawing two clubs from a well shuffled pack of 52 cards?
0

A. 26-Jan

B. 1/17

C. 13/17

D. 13/51

14. Three 6 faced dice are thrown together. The probability that exactly two dice show the same number on them is -.
0

A. 5/12

B. 9-May

C. Jan-36

D. 12-Jul

15. Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is_________?
0

A. 46/105

B. Cannot be determined

C. 17-Oct

D. 19-Oct

16. A coin is tossed live times. What is the probability that there is at the least one tail?
0

A. 16-Jan

B. 2-Jan

C. 31/32

D. Jan-32

17. A bag contains five white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color?
0

A. 5/9

B. 9-Aug

C. 9-Jul

D. 9-Apr

18. The probability of a lottery ticket being a prized ticket is 0.2. When 4 tickets are purchased, the probability of winning a prize on at least one ticket is__________?
0

A. 0.5834

B. 0.5904

C. 0.4869

D. 0.6234

19. If a card is drawn from a well shuffled pack of cards, the probability of drawing a spade or a king is__________?
0

A. 19/52

B. 17/52

C. 13-May

D. 4/13

20. From a pack of cards two cards are drawn one after the other, with replacement. The probability that the first is a red card and the second is a king is_________?
0

A. 15/26

B. Mar-52

C. 1/26

D. 26-Nov

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