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A sock drawer has 17 folded pairs of socks, with 9 pairs of white, 5 pairs of black and 3 pairs of blue.
A sock drawer has 17 folded pairs of socks, with 9 pairs of white, 5 pairs of black and 3 pairs of blue. What is the probability, without looking in the drawer, that you will first select and remove a black pair, then select either a blue or a white pair?