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Random Probability Problem

  1. Jul 9, 2011 #1
    In a box with 80 tickets, 10 people buy 10 tickets each. If there are 4 winning tickets drawn at random find the probability that
    1) one person gets all 3 winning tickets
    2) there are 3 different winners
    3) some person gets two winners and someone else gets just one

    for 1) 10 C 3 * 70 C 7

    is the answer = -------------------- where C stands for chooses.
    80 C 10

  2. jcsd
  3. Jul 10, 2011 #2


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    That's 100 tickets :redface:

    have the police been informed?
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