Aptitude - Probability

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Question 1

Select the option of exhaustive events.

Question 2

A page is opened at random from a book containing 600 pages. What is the probability that the number on the page is a perfect square.

Question 3

Find the probability of throwing a total score 8 with 2 dice.

Question 4

If two cards are drawn from a pack of cards from pack of 52 cards at random, then find the probability of getting both club cards.

Question 5

A and B are among 20 persons who sit at random along a round table. Find the probability that there are exactly six persons between A and B.

Question 6

Suppose S = {1,2,3,4} is the sample space of a random experiment. Suppose P(1) =x,P(2) = 2x,P(3) =3x,P(4) =4x, where P is a probability function. Find x.

Question 7

If P(A) = x, P(B) = y and P(A∩B) = z. Find P(A' ∩ B').

Question 8

When 'n' letters are randomly placed in 'n' addressed envelopes, find the probability that all the letters go into the right envelope.

Question 9

P(A) = 0.5 , P(B) = 0.3 and A,B are mutually exclusive then what is the probability that neither A nor B occurs.

Question 10

Suppose there are 12 boys and 4 girls in a class.If we choose three children one after other in succession at random, find the probability that all the three are boys.

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