Plz tell the solution to this problem(adsbygoogle = window.adsbygoogle || []).push({});

Each of n urns contains a white balls and b black balls; the urns are numbered 1,2,

. . . , n. One randomly selected ball is transferred from the firrst urn into the second,

then another from the second into the third, and so on. Finally a ball is drawn at

random from the nth urn. What is the probability that it is white

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# URN problem

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