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Math Help - Combination problem

  1. #1
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    Combination problem

    Hi , getting a little stuck with this question, any advice would be great,

    How many 10 letter combinations can be selected from 17 different letters?
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  2. #2
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    Quote Originally Posted by offahengaway and chips View Post
    How many 10 letter combinations can be selected from 17 different letters?
    \binom{N}{K}=\frac{N!}{K!(N-K)!} N=17~\&~K=10
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  3. #3
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    Would it not be (11 P 2)
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  4. #4
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    Quote Originally Posted by offahengaway and chips View Post
    Would it not be (11 P 2)
    No. Does it permutations?
    Dose not say combinations?
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