Find the average of first 4 multiples of 12?	Choose one.
A) 10 B) 12.6 C) 22.5 D) 30 E) 40.8
average = (12+24+36+48)/4= 
<gadget id="calculator">(12+24+36+48)/4</gadget>
<output>30</output>
30   Answer is 30
<result>D</result>
Find the average of first 4 multiples of 12?