1,-3,2,-4,3,-5.... upto 2000 terms. find the average	Choose the correct choice from the following answers:
A) 2  B) 1  C) 0  D) 2  E) -1
here in the question the average is asked for up to 2000 terms.   so up to 2000 terms will be   {1,-3,2,-4,3,-5,.........,1000,-1002}   so if we add them like this   {(1-3)+(2-4)+(3-5)+.........+(1000-1002)}   this will a sum of   {-2-2-2-2-......-2} for thousand times   i.e. {1000*(-2)}   therefore the sum is -2000   the average will be -2000/2000 = -1   ANSW-1R:-1
<result>E</result>
1,-3,2,-4,3,-5.... upto 2000 terms. find the average