The average of first five multiples of 3 is :	Choose the correct choice from the following:
A) 3  B) 9  C) 12  D) 15  E) 17
Solution   Average = 3(1+2+3+4+5)/5 =45/5= 
<gadget id="calculator">45/5</gadget>
<output>9</output>
9 Answer 9
<result>B</result>
The average of first five multiples of 3 is :