Question

Evaluate n! /(n-r)! when n=6 and r=2 it's from permutations and combination chapter pleas give correct answer

Answer 1

Hi friends

Here is your answer

n= 6
r = 2

n!/(n - r)!

6!/(6 - 2)!

$= \frac{6 \times 5 \times 4 \times 3 \times 2 \times 1}{4 \times 3 \times 2 \times 1} \\ \\ = 6 \times 5 \\ \\ = 30$
Hope it helps you

@ MSD