A certain flight arrives on time 84 percent of the time. Suppose 143 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that (a) exactly 113...

A certain flight arrives on time 84 percent of the time. Suppose 143 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that

(a) exactly 113 flights are on time.

(b) at least 113 flights are on time.