Statistics homework help me!

Question

A) Transport America reported that 87.1% of American drivers and passengers buckled up for safety.

If 4 people are selected at random, Find a probability that they all used a seat belt while driving.

Answer 1

Probability for 1 person, p = 87.1/100 =0.871

Probability for 4 persons is p^4

= 0.871^4

= 0.5755