Question

Experts consider high serum cholesterol levels to be associated with an increased incidence of coronary heart disease .suppose that the logarithm of cholesterol levels for males in a given age bracket are normally distributed with mean of 2.35 and a standard deviation of 12 .
a- what percentage of the males in this age bracket could be expected to have a serum cholesterol level greater than 250 mg/ml , the upper limit of the clinical normal range ?

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