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4.47 Working on summer vacation. Recall (Exercise 3.13 \( \square \) ?, p. 145) that a Harris Interactive (July 2013) poll found that \( 22 \% \) of U.S. adults do not work at a while on summer vacation. In a random sample of 10 U.S. adults, let \( x \) represent the number who do not work during summer vacation. a. For this experiment, define the event that represents a "success." b. Explain why \( x \) is (approximately) a binomial random variable. c. Give the value of \( p \) for this binomial experiment. d. waFind \( P(x=3) \). e. Find the probability that 2 or fewer of the 10 U.S. adults do not work during summer vacation.

a. For the given experiment, the event that "the adult does not work during summer vacation" represents the success.

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