binomial prbabily

Question

A survey reports that the probability a person has blue eyes is 0.10. Assume that 4 people are randomly selected at Miramar College and asked if they have blue eyes, find the probability that at least 1 of them have blue eyes.

Answer 1

P(At least 1 blue eyes)=1-P(No one has blue eyes)

 

P(No one has blue eyes)=(1-.1)⁴=(0.9)⁴

 

P(At least 1 blue eyes)=1-(0.9)⁴=.3439