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In a certain town the length of residence of a family in a home is normal with mean 80 months and variance 900 What is the probability that of 12 independent families living on a certain street of


In a certain town the length of residence of a family in a home is normal with mean 80 months and variance 900. What is the probability that of 12 independent families, living on a certain street of that town, at least three will have lived there more than eight years?

Aug 03 2020 Read more Less More

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