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Joe has a drawer with 5 blue socks, 7 red socks, 3 white socks, and 4 green socks.  If he draws two socks at random, what is the probability that they match?

 May 5, 2020
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((5 chose 2)+ (7 chose 2) + (4 chose 2))/((5+7+3+4) chose 2)

 May 5, 2020
edited by Guest  May 5, 2020

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