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Math Help - simplifying an expression

  1. #1
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    simplifying an expression

    I have an expression for a conditional probability with the following term:

    N!/n!(N-n)!

    I can't remember how to simplify this i know that it is (N choose n )*1/n! but can it be simplified further?
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  2. #2
    MHF Contributor matheagle's Avatar
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    {N\choose n} is {N!\over (N-n)!n!}

    so I don't know what you're asking, why don't you state the entire problem.
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  3. #3
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    Yes its N choose n, i got it now i was confusing myself after looking at the problem for a while
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