Solve the problem.
-In how many ways can 9 people be chosen and arranged in a straight line, if there are 10 people from whom to choose?
A) 3,628,800
B) 10
C) 20
D) 90

Question

Quizplus · Accepted Answer

First, choose 9 people out of 10, which can be done in 10 ways (10C9). Then, arrange these 9 people in a line, which can be done in 9! ways. Multiplying these gives 10 * 9! = 10 * 362,880 = 3,628,800.

Solve the Problem. -In How Many Ways Can 9 People Be Chosen and Be