Answer
$13_{{C}{_{6}}}$ = 1716
Work Step by Step
This problem has the case of combinations thus we use the formula $n_{{C}{_{r}}}$ = $\frac{n!}{(n - r)! r!}$.
We have to choose 6 people out of 13 then $13_{{C}{_{6}}}$ = $\frac{13!}{(13 - 6)! 6!}$
= $\frac{13\times12\times11\times10\times9\times8\times7!}{7! .6\times5\times4\times3\times2\times1!}$ = 1716
