Question

Ex: Neckwear association reported 3% of ties sold in the US are bow ties. If 4 customers purchased a tie, find the probability that at least one purchased a bow tie.

Answer 1

P=0.1147

Explanation:

P(bow tie)=0.03

P(no bow tie)=0.97

n=4

`P(at \ least \ one)=1-P(none)\\=1-(1-0.03)^4\\=0.1147`