(Answered) Suppose that about 85 graduating students attend their

Statistics

Suppose that about 85% graduating students attend their graduation. A group of 22 graduating students is randomly chosen.

a. How many are expected to attend their graduation?

b. Find the probability that 17 or 18 attend.

c. Based on numerical values, would you be surprised if all 22 attended graduation? Justify your answer numerically.

d. Find the probability that more than half of the graduating students attend their graduation.

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