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The total cholesterol levels of a sample of men aged​ 35-44 are normally distributed with a...

The total cholesterol levels of a sample of men aged​ 35-44 are normally distributed with a mean of 220 milligrams per deciliter and a standard deviation of 38.3 milligrams per deciliter.

​(a) What percent of the men have a total cholesterol level less than 233 milligrams per deciliter of​ blood? ​round to two decimal places.

​(b) If 256 men in the​ 35-44 age group are randomly​ selected, about how many would you expect to have a total cholesterol level greater than 263 milligrams per deciliter of​ blood? ​round to two decimal places

Math   Statistics-And-Probability   
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