The total cholesterol levels of a sample of men aged35-44are normally distributed with a mean of

220

milligrams per deciliter and a standard deviation of

37.4

milligrams per deciliter.

(a)What percent of the men have a total cholesterol level less than

235

milligrams per deciliter ofblood?

(b)If

256

men in the35-44age group are randomlyselected,about how many would you expect to have a total cholesterol level greater than

251

milligrams per deciliter ofblood?