Solution: Find the probability that both balls are white

From a bag containing 4 black balls and 5 white balls, two balls are drawn one at a time. Find the probability that both balls are white. Assume that the first ball is returned before the second ball is drawn.

Find the probability that both balls are white

Problem Statement: EE Board October 1990

From a bag containing 4 black balls and 5 white balls, two balls are drawn one at a time. Find the probability that both balls are white. Assume that the first ball is returned before the second ball is drawn.

Problem Answer:

The probability that both balls are white is 25/81.

Solution:

Online Questions and Answers in Venn Diagram, Permutation, Combination and Probability


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