Answer
$C(8,2)=28$
Work Step by Step
Using the combination formula, we obtain:
$C(n,r)=\frac{n!}{(n-r)!r!}$
$C(8,2)=\frac{8!}{(8-2)!2!}=\frac{8!}{6!2!}=\frac{8\cdot7\cdot6!}{6!\cdot2\cdot1}=28$
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