Question

A certain flight arrives on time 81 percent of the time. Suppose 122 flights are randomly...

A certain flight arrives on time 81 percent of the time. Suppose 122 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that

​(a) exactly 110 flights are on time.

​(b) at least 110 flights are on time.

​(c) fewer than 110 flights are on time.

​(d) between 110 and 111, inclusive are on time.

Math   Statistics-And-Probability   
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Answer #1

a)

b)

c) P( x < 110) = P( x <= 109)

d)

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