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Math Help - number of throws till die shows all faces

  1. #1
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    number of throws till die shows all faces

    A fair die is thrown until each of its 6 faces have been shown at least once, what is the expected number of throws?

    thanks for any help
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  2. #2
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    Re: number of throws till die shows all faces

    Quote Originally Posted by hmmmm View Post
    A fair die is thrown until each of its 6 faces have been shown at least once, what is the expected number of throws?

    thanks for any help
    Read this: Coupon collector's problem - Wikipedia, the free encyclopedia
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