The notation $\left( \frac { \mathbf { n } } { \mathrm { r } } \right) \text { means } \left( \frac { \mathrm { n } ! } { \mathrm { r } ! ( \mathrm { n } - \mathrm { r } ) ! } \right) \text {. Evaluate the expression. }$
-$\left( \begin{array} { l } 9 \ 9 \end{array} \right)$
A) 362,880
B) 2
C) 0
D) 1

Question

Quizplus · Accepted Answer

The expression $\left( \begin{array} { l } 9 \ 9 \end{array} \right)$ is equivalent to $\frac{9!}{9!(9-9)!}$, which simplifies to $\frac{9!}{9!0!}$. Since $0! = 1$, the expression further simplifies to $\frac{9!}{9!} = 1$.

The Notation - (99)\left( \begin{array} { l } 9 \\ 9 \end{array} \right)(99​)

The Notation - $\left( \begin{array} { l } 9 \\ 9 \end{array} \right)$