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Question Number 11344 by jaskaurrangerleader@gmail.com last updated on 21/Mar/17

$$n_{c_n}=\frac{n!}{(n-n)!n!}$$

Commented by FilupS last updated on 21/Mar/17

$$\frac{n!}{(n-n)!\cdot n!}=\frac{1}{0!}$$$$=\frac{1}{1}=1$$

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