The Total Cholesterol levels of a sample of men aged 35-44 are normally distributed with the mean of 203 milligrams per deciliter and a standard deviation of 37.4 milligrams per deciliter.
(a) What percent of men have a total cholesterol level less then 219 milligrams per deciliter of blood?
(b) if 257 men in the 35-44 age group are randomly selected, about how many would you expect to have a total cholesterol level greater than 268 milligrams per deciliter of blood?