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Thread: Combination with repetitions

  1. October 28th 2008, 03:05 AM #1
    leminhtoan
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    Combination with repetitions

    Please help me to demonstrate the formula of combination with repetition. Thanks. \frac{(n+k-1)!}{(n-1)!k!}\
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  2. October 28th 2008, 07:31 AM #2
    Plato
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    Here is a pdf file on multiple selections.
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