[单选题]

Use the following data to answer Questions 15 through 17.
  A study of hedge fund investors found that their annual household incomes are normally distributed with a mean of $175,000 and a standard deviation of $25,000.The percent of hedge fired investors that have incomes greater than $150,000 is closest to:

A.34.13%.

B.68.26%.

C.84.13%.

参考答案与解析: