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Math Help - Simple permutation question

  1. #1
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    Simple permutation question

    Why is _nC_0=1?
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  2. #2
    Master Of Puppets
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    As 0! = 1 then

     <br />
^nC_0 = \frac{n!}{0!(n-0)!}= \frac{n!}{n!}= 1<br />
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