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There are 3 math clubs in the school district, with 5, 7, and 8 students respectively. Each club has two co-presidents. If I randomly select a club, and then randomly select four members of that club to give a copy of Introduction to Counting and Probability, what is the probability that two of the people who receive books are co-presidents?

 May 22, 2021
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The probability is 2/33.

 Jun 19, 2021

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