Question

permutation and combination ​

Answer 1

Answer:

i guess!!

Step-by-step explanation:

4-4=0. factorial 4/factorial 4=1

Answer 2

nCr= n! /(n-r)!

so, 4C4=4! /(4-4)! = 4! /0!

so, anything by 0! is = 1 by property so the answer will be =1