Posted by **Cindy** on Tuesday, January 5, 2010 at 8:03am.

A box A contains 9 red balls and 1 white ball. A box B contain 8 red balls and 1 white ball. A ball is to be taken at random from box A and put into box B. Then a ball is to be taken at random from box B. Find the probability that this ball from box B is white.

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