Probability Distributions

Diane Bruns is the mayor of a large city Lately, she become concerned about the possibility that large numbers of people who are drawing unemployment checks are secretly employed. Her assistants estimate that 40 percent of unemployment beneficiaries fall into this category, but Ms.Bruns is not convinced. She asks one of here aides to conduct a quiet investigation of 10 randomly selected unemployment beneficiaries.

1. If the mayor's assistants are correct, what is the probability that more than eight of the individual investigated haver jobs? (Do not use the tables.)
2. If the mayor's assistants are correct, what is the probability that only three of the investigated individuals have jobs? (Do not use the tables.)

Solution