opose that Detective Williams's case load currently has 49 unsolved murders. Use a normal distrib praximation to the binomial distribution to find the following probabilities: What is the probability that at least 30 of the victims among Detective Williams's case files knew rderer? What is the probability that between 30 and 39 of the victims knew their murderer?

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About 69% of people who are murdered knew the person who committed the murder.
Suppose that Detective Williams's case load currently has 49 unsolved murders. Use a nomal distribution
approximation to the binomial distribution to find the following probabilities:
a. What is the probability that at least 30 of the victims among Detective Williams's case files knew their
murderer?
b. What is the probability that between 30 and 39 of the victims knew their murderer?
Transcribed Image Text:About 69% of people who are murdered knew the person who committed the murder. Suppose that Detective Williams's case load currently has 49 unsolved murders. Use a nomal distribution approximation to the binomial distribution to find the following probabilities: a. What is the probability that at least 30 of the victims among Detective Williams's case files knew their murderer? b. What is the probability that between 30 and 39 of the victims knew their murderer?
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