Answer
It is a binomial experiment.
Work Step by Step
It is a binomial experiment because of the following:
1. It is performed a fixed number of times, n = 10.
2. The trials are independent.
3. For each trial, there are two possible mutually exclusive outcomes: smoker started smoking before 21 or smoker started smoking after 21.
4. The probability of “smoker started smoking before 21” is fixed at p = 0.90.
