# Quantitative Aptitude Questions and Answers - Probability

11. A carton contains 12 green and 8 blue bulbs .2 bulbs are drawn at random. Find the probability that they are of same colour?

A. (91/47)
B. (47/105)
C. (47/95)
D. (47/145)

12. In a Coupon, there are 30prizes and 75blanks. A Coupon is drawn at random. What is the probability of getting a prize?

A. (2/7)
B. (5/7)
C. (1/2)
D. (5/12)

13. Two dice are rolling simultaneously .What is the probability that the sum of the number on the two faces is divided by 5 Or 7

A. (13/36)
B. (14/36)
C. (15/36)
D. (11/36)

14. Consider a pack contains 2black, 9 white and 3 pink pencils. If a pencil is drawn at random from the pack, replaced and the process repeated 2 more times, What is the probability of drawing 2 black pencils and 1 pink pencil?

A. (3/49)
B. (3/386)
C. (3/14)
D. (3/545)

15. A box contains 3red, 8 blue and 5 green marker pens. If 2 marker pens are drawn at random from the pack, not replaced and then another pen is drawn. What is the probability of drawing 2 blue marker pens and 1 red marker pen?

A. (1/20)
B. (3/20)
C. (7/20)
D. (9/20)

16.  Consider the example of finding the probability of selecting a red card or a 9 from a deck of 52 cards

A. (5/13)
B. (6/13)
C. (7/13)
D. (8/13)

17. A single coin is tossed 7 times. What is the probability of getting at least one tail?

A. (55/128)
B. (56/128)
C. (127/128)
D. (126/128)

18. Murali and his wife appear in an interview for two vacancies in the same post. The probability of murali's selection is (1/6) and the probability of wife's selection is (1/4). What is the probability that only one of them is selected ?

A. (1/2)
B. (1/3)
C. (1/4)
D. (1/6)

19. Two dice are tossed. The probability that the total score is a prime number is:

A. (5/12)
B. (7/12)
C. (11/12)
D. (1/3)

20. A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is:

A. (1/13)
B. (1/26)
C. (3/52)
D. (1/52)