There are two balls in an urn. Each ball can be either white or black. If a white ball is put into the urn and there after a ball is drawn at random from the urn, then the probability that it is white

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There are two balls in an urn. Each ball can be either white or black. If a white ball is put into the urn and there after a ball is drawn at random from the urn, then the probability that it is white is

TestHub · Accepted Answer

Total possible event when one ball is taken out = 3 C 1 ​ Let E : The event of 1 white ball coming out No. of ways to 1 white ball coming out = 2 C 1 ​ ∴ P ( E ) = 3 C 1 ​ 2 C 1 ​ ​ = 3 2 ​

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