Question

Evaluate 7!/5!2! A)1 B)21 C)42

Answer 1

Answer:

B) 21

Step-by-step explanation:

Write out the factorials as the full expressions of every number being multiplied.

$\frac{7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}{5 \times 4 \times 3 \times 2 \times 1 \times 2 \times 1}$

Now cancel any numbers on the top and bottom to give:

$\frac{7 \times 6}{2}$

This is simplified to

$\frac{42}{2}$

which is equal to 21