The notation $\left( \frac { \mathbf { n } } { \mathrm { r } } \right) \text { means } \left( \frac { \mathrm { n } ! } { \mathrm { r } ! ( \mathrm { n } - \mathrm { r } ) ! } \right) \text {. Evaluate the expression. }$
-$\left( \begin{array} { c } 10 \ 5 \end{array} \right)$
A) 252
B) 2
C) 30,240
D) 126

Question

Quizplus · Accepted Answer

The expression $\left( \begin{array} { c } 10 \ 5 \end{array} \right)$ represents the number of ways to choose 5 items out of 10, which is calculated as $\frac{10!}{5!(10-5)!} = 252$.

The Notation - (105)\left( \begin{array} { c } 10 \\ 5 \end{array} \right)(105​)

The Notation - $\left( \begin{array} { c } 10 \\ 5 \end{array} \right)$