Urn Problem

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Suppose you have a lottery ticket. The ticket shows your six good balls, and there are 50 bad balls. Six balls are picked from the 56 balls in an urn. What are your chances of getting exactly 4, 5, or 6 matches? Many lotteries and gambling games are based on this concept of picking from mixed good and bad balls.

Contributed by: Ed Pegg Jr (March 2011)
Open content licensed under CC BY-NC-SA


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