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A bag contains 5 white balls, 3 black ba...

A bag contains 5 white balls, 3 black balls, 4 yellow balls. A ball is drawn from the bag, its colour is noted and put back into the bag with 5 additional balls of the same colour. The process is repeated. The probability that a yellow ball is drawn in the `1^("st")` draw given that a white ball is drawn in the `2^("nd")` draw is

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