Question

Evaluate 7C6. (1 point) A. 9 B. 1 C. 5,040 D. 7

Answer 1

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Answer 2

$\bf _nC_r=\cfrac{n!}{r!(n-r)!}\qquad \begin{cases} n=\textit{total elements}\\ r=\textit{partials}\\ --------\\ n=7\\ r=6 \end{cases}\implies _7C_6=\cfrac{7!}{6!(7-6)!}$