According to the U.S. Census Bureau, about 20% of Idaho residents live in metropolitan areas. A catalog sales company in Georgia has just purchased a list of Idaho consumers. Its market analyst...

Extracted text: According to the U.S. Census Bureau, about 20% of Idaho residents live in metropolitan areas. A catalog sales company in Georgia has just purchased a list of Idaho consumers. Its market analyst randomly selects 21 people from this list. (a) What is the probability that exactly five people live in metropolitan areas? (b) What is the probability that more than two people live in metropolitan areas? (c) What is the expected number of people who live in metropolitan areas? (d) What is the standard deviation of people who live in metropolitan areas?