Question Number 11344 by jaskaurrangerleader@gmail.com last updated on 21/Mar/17
$${n}_{{c}_{{n}} } =\frac{{n}!}{\left({n}−{n}\right)!{n}!} \\ $$
Commented by FilupS last updated on 21/Mar/17
$$\frac{{n}!}{\left({n}−{n}\right)!\centerdot{n}!}=\frac{\mathrm{1}}{\mathrm{0}!} \\ $$$$=\frac{\mathrm{1}}{\mathrm{1}}=\mathrm{1} \\ $$