Question

Based on a​ poll, among adults who regret getting​ tattoos, 18 ​% say that they were too young when they got their tattoos. Assume that nine adults who regret getting tattoos are randomly​ selected. Find the probability that none of the selected adults say that they were too young to get tattoos.

Answer 1

P(an adult saying that he/she was too young when they got their tattoos) = 0.18

P(an adult not saying that he/she was too young when they got their tattoos) = 1 - 0.18 = 0.82

Number of adults selected = 9

P(none of the selected adults say that they were too young to get tattoos) = 0.82⁹

= 0.1676