Find the difference between the average of first n even numbers and the average of all the even numbers up to n (n is an even number).	Choices
A) n
B) (n-1)/2
C) n/2
D) cannot be determined
E) None of these
Explanation :   (n+1)-((n/2)+1)   Answer : n/2
<result>C</result>
Find the difference between the average of first n even numbers and the average of all the even numbers up to n (n is an even number).