posted by holly .
According to a website about salaries, the national average salary as of October 2003 for a human resources clerk was $29,932. We assume that the annual salaries for clerks are normally distributed with a standard deviation of $1,860. (Give your answers correct to two decimal places.)
(a) Find the percentage who earn less than $27,480.
(b) Find the percentage who earn more than $31,808.