Evaluate the expression.
-$\left( \begin{array} { l } 7 \ 2 \end{array} \right)$
A) 10
B) 2520
C) 3
D) 21

Name: Evaluate the expression. -$\left( \begin{array} { l } 7 \\ 2 \end{array} \right)$ A) 10 B) 2520 C) 3 D) 21
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Question

Quizplus · Accepted Answer

The expression $\left( \begin{array} { l } 7 \ 2 \end{array} \right)$ represents a combination, which calculates the number of ways to choose 2 items out of 7 without regard to order. It is calculated as $7! / (2!(7-2)!)$, which simplifies to $7*6/2 = 21$.

Evaluate the Expression (72)\left( \begin{array} { l } 7 \\ 2 \end{array} \right)(72​)

Evaluate the Expression $\left( \begin{array} { l } 7 \\ 2 \end{array} \right)$