Probability - Aptitude 1 MCQ Questions and Solutions

1 . An urn contains 6 red, 5 blue and 2 green marbles. If 2 marbles are picked at random, what is the probability that both are red?

• (6/56)
• (5/26)
• (7/89)
• (1/2)

Answer - [ (5/26) ]

2 . You toss a coin and roll a die. What is the probability of getting a tail and a 4 on the die?

• 1/2
• 3/6
• 1/12
• 1/20

Answer - [ 1/20 ]

3 . Two cards are drawn from a pack of well shuffled cards. Find the probability that one is a club and other in King.

• 1/34
• 1/26
• 1/38
• 2/36

Answer - [ 1/26 ]

4. P and Q sit in a ring arrangement with 10 persons. What is the probability that P and Q will sit together?

• 3/11
• 2/11
• 4/15
• 5/15

Answer - [2/11]

5 . In a race, the odd favour of cars P, Q, R, S are 1 : 3, 1 : 4, 1 : 5 and 1 : 6 respectively. Find the probability that one of them wins the race.

• 543/232
• 319/420
• 324/545
• 1/232

Answer - [ 319/420 ]

6 . In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green ?

• 5/21
• 8/21
• 5/78
• 8/45

Answer - [ 8/21 ]

7 . A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?

• 5/4
• 3/6
• 4/7
• 6/2

Answer - [4/7]

8 . Dev can hit a target 3 times in 6 shots pawan can hit the target 2 times in 6 shots and Lakhan can hit the target 4 times in 4 shots. What is the probability that at least 2 shots hit the target?

• 4/32
• 2/3
• 5/6
• 3/3

Answer - [ 2/3 ]

9 . A bag contains 4 red, 5 yellow and 6 pink balls. Two balls are drawn at random. What is the probability that none of the balls drawn are yellow?

• 4/32
• 3/23
• 3/7
• 6/4

Answer - [3/7]

10 . In a simultaneous throw of two dice, what is the probability of getting a doublet ?

• 6/7
• 1/8
• 1/7
• 1/6

Answer - [ 1/6 ]

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