Question: 53. A study reported that 7.5% of the workforce has a drug problem. A drug enforcement official wished to investigate this statement. In his sample

53. A study reported that 7.5% of the workforce has a drug problem. A drug enforcement official wished to investigate this statement. In his sample of 20 employed workers:

a. How many would you expect to have a drug problem? What is the standard deviation?

b. What is the likelihood that none of the workers sampled has a drug problem?

c. What is the likelihood at least one has a drug problem?

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