Assignment 5.1

# 10 a survey of a magazines subscribers indicates that

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10.  A survey of a magazine’s subscribers indicates that 50% own a home, 80% own a   car, and 90% of the homeowners who subscribe also own a car. What proportion  of  subscribers: a. own both a car and a house? b. own a car or a house, or both?

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c. own neither a car nor a house? 11. Suppose 30% of business majors major in accounting. You take a random sample of 3  business majors. a. What is the chance that they all major in accounting? b. What is the chance that at least one majors in accounting? c. What is the chance that exactly one majors in accounting? d. What is the chance that none of them major in accounting? 12. Suppose 55 percent of adults drink coffee, 45 percent drink soft drinks, and 10 percent drink both. a. What is the probability that a randomly chosen adult does not drink soft drinks? b. What is the probability that a randomly chosen adult drinks soft drinks or coffee or both?
c. What is the probability that a randomly chosen adult doesn’t drink coffee or soft drinks? 13. Suppose X = the number of pets owned by a family in the U.S. The probability distribution of X is shown in the table below.

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