# Probability – Aptitude MCQ Questions – 11

Question 1
A coin is tossed live times. What is the probability that there is at the least one tail?

 A. 31/32 B. 1/16 C. 1/2 D. 1/32

Question 2
A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If three marbles are drawn what is the probability that one is yellow and two are red?

 A. 24/455 B. 3/91 C. 12/455 D. 15/91

Question 3
In a party there are 5 couples. Out of them 5 people are chosen at random. Find the probability that there are at the least two couples?

 A. 5/21 B. 5/14 C. 9/14 D. 16/21

Question 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?

 A. 1/455 B. 2/455 C. 1/91 D. 4/455

Question 5
If a number is chosen at random from the set {1, 2, 3, ......., 100}, then the probability that the chosen number is a perfect cube is -

 A. 1/25 B. 1/2 C. 4/13 D. 1/10

Question 6
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?

 A. 3/22 B. 4/21 C. 2/21 D. 1/14

Question 7
10 books are placed at random in a shelf. The probability that a pair of books will always be together is -

 A. 1/10 B. 9/10 C. 1/5 D. 3/10

Question 8
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 -

 A. 1/26 B. 3/52 C. 15/26 D. 11/26

Question 9
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 -

 A. 8/15 B. 2/5 C. 3/5 D. 7/15

Question 10
What is the probability that a leap year has 53 Sundays and 52 Mondays?

 A. 1/7 B. 2/7 C. 5/7 D. 6/7