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13 February, 20:19

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 three 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?

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Answers (2)
  1. 13 February, 23:11
    0
    11/60

    Step-by-step explanation:

    this is kinda hard to explain
  2. 13 February, 23:25
    0
    11/180

    Step-by-step explanation:

    1/3 * (2 / (5*4) + 2 / (7*6) + 2 / (8*7))

    prob of choosing a team prob of choosing captain.
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