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A certain flight arrives on time 87 percent of the time. Suppose 157 flights are randomly...

A certain flight arrives on time 87 percent of the time. Suppose 157 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that
​(a) exactly 142 flights are on time.
​(b) at least 142 flights are on time.
​(c) fewer than 138 flights are on time.
​(d) between 138 and 149​, inclusive are on time.

Math   Statistics-And-Probability   
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