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Suppose that in a certain region of the country the mean duration of first marriages that end in divorce is7.8years,standard deviation 1.2years. a.Find the probability

Suppose that in a certain region of the country the mean duration of first marriages that end in divorce is7.8years,standard deviation 1.2years.

a.Find the probability that in asample of75divorces, the mean age of the marriages is at most88years.

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