Question

Help me please as fast as fast as you can 20 points!!

Answer 1

see below

Explanation:

4! = 4*3*2*1 = 24

10 C3 = 10 CHOOSE 3 =10! /(3! (10 - 3)!) = 10! / 3! * 7! = 10*9*8 / 3*2*1 = 120

7P3 = permutation = 7! / (7-3)! = 7! /4! = 7*6*5 = 210