If the wages of workers for a given company are normally distributed with a mean of $15 per hour, then the proportion of the workers earning more than $13 per hour

Select one:

a. is greater than the proportion earning less than $13 per hour.

b. is less than 50 percent.

c. is greater than the proportion earning less than $18 per hour.

d. is less than the proportion earning more than the mean wage.