another easy one...I'm totally missing something....
#of employees     Salary
5                         $20,000
4                         $22,000
8                         $25,000 
3                         $30,000
The table shows the number of employees at each of four salary levels at Company X. What is the average salary for the 20 employees?
a) $23,500
b) $23,750
c) $23,750
d) $24,125
e) $24,250
							