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18. EARN MORE THAN YOUR PARENTS? In 1970, 92% of American 30-year- olds earned more than their parents did at age 30 (adjusted for inflation).

18. EARN MORE THAN YOUR PARENTS? In 1970, 92% of American 30-year- olds earned more than their parents did at age 30 (adjusted for inflation). In 2014, only 51% of American 30-year-olds earned more than their parents did at age 30. Source: Wall Street Journal, December 8, 2016. a. What is the probability a randomly selected 30-year-old in 1970 earned more than his or her parents at age 30? b. What is the probability that two randomly selected 30-year-olds in 1970 earned more than their parents at age 30? c. What is the probability that out of ten randomly selected 30-year-olds in 1970, at least one did not earn more than his or her parents at age 30? d. What is the probability that out of ten randomly selected 30-year-olds in 2014, at least one did not earn more than his or her parents at age 30

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