Question
Asked Jan 22, 2019
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A drawer contains 17 black socks, 17 white socks, 17 blue socks, and 17 brown socks. If the light is off and Matt reaches into the drawer to get his​ socks, what is the minimum number of socks he must pull out in order to be sure that he has a matching​ pair?

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Expert Answer

Let’s say that he has picked four socks. If he have already found a pair after two or three or four draws, he is done. But it is possible that after two or three or four draws he does not find a match.

So let’s assume that after four draws he has one black, one white , one blue and one brown sock. Now if he draws the fifth one, he must have pic...

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