In how many ways can five people be seated in a row of five seats?

Question

In how many ways can five people be seated in a row of
five seats?

Answer 1

for the first seat you choose from 5 people

for the second seat you choose from 4 people

for the third seat you choose from 3 people

for the fourth seat you choose from 2 people

for the fifth seat you have 1 person left

5*4*3*2*1=120 ways