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Problems on Probability | Aptitude questions and answers Problems on Probability | Aptitude questions and answers
Note: Objective type question pattern is used here.
Out of four choices, you are requested to select the best possible answer(s).

1. A boy has several colored balls in his bag - 12 white, 15 orange and 25 pink. The lights are out and it is totally dark. Now, how many balls he must take out to make sure that he has a pair of each color?

A. 40

B. 42

C. 6

D. 12

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

A. 1 / 6

B. 5 / 12

C. 1 / 2

D. 7 / 9

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3. A square garden has fourteen posts along each side at equal interval. Find how many posts are there in all four sides:

A. 52

B. 56

C. 60

D. 62

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4. If a number selected at random from a set which contains only 2 digit numbers, find the probability that the selected number will be a multiple of "8".

A. 1/10

B. 4/45

C. 1/15

D. None of these

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5. What is the probability that a number selected at random from the set of 3 digit numbers will be a multiple of "9" and a divisor of 900 ?

A. 1/450

B. 5/36

C. 1/180

D. 7/900

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