According to an airline, flights on a certain route are on time 80% of the time. Suppose 15 flights are randomly selected and the number of on-time flights is recorded. (a) Explain why this is a binomial experiment.
(b) Find and interpret the probability that exactly 9 flights are on time.
(c) Find and interpret the probability that fewer than 9 flights are on time.
(d) Find and interpret the probability that at least 9 flights are on time.
(e) Find and interpret the probability that between 7 and 9 flights, inclusive, are on time.