In a recent survey the Pew Research Center asked graduates
of private universities whether they were satisfied with their current job and
72% said they were. Suppose you take a sample of four private university
graduates and ask each whether they are satisfied with their current jobs. a.
What is the probability that all four say they are satisfied? b. What is the
probability that two say they are satisfied? c. Determine the expected number
of people who are satisfied.
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