Question

A supervisor has determined that the average salary of the employees in his department
$40,000 with a standard deviation of $15,000. Assume that the distribution of the salaries is
normally distributed. An employee is selected at random, find the probability that the
employee’s salary is:

Answer 1

Please post the full question.

That being said, if it asks for the probability that the salary is above/below a certain value, you need to calculate the z-score for that value

z = (x - mean) / SD

then use a z-table/calculator to convert the z-score to the correct probability. as a reminder, by default you will obtain the probability of obtaining a value below the input value x, so if you want the probability above x, you need to take 1 - (probability of getting below x)