What is the expected number of north americans

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According to Cruise Lines International Corporation, 28% of the North Americans who have taken a cruise in the past five years were at least 60 years old.

a. If 12 North Americans who have taken a cruise in the last five years are selected at random, find the probability that at least one of them was at least 60 years old at the time. (If you use the Binomial to answer, show your justifications.)

b. What is the expected number of North Americans who have taken a cruise in the last five years that were at least 60 years old for a sample of this size?

c. What is the standard deviation?

Reference no: EM132488358

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