M is the set of all consecutive odd integers between A and B. If B>A>1, and both A and B are even integers, what is the average (arithmetic mean) of M?	Choose the correct choice:
A) (A−B)/2
B) (A−B)/2 + 1
C) (A+B−1)/2
D) (A+B)/2
E) (A+B+1)/2
Let A be 2 and B be 6...as per condition..A and B have to be even...   2,3,4,5 and 6...then M is avg of odd integers...in our case 3+5/2 = 4..   We need to check which option is going to yield 4 and only option D does..   6+2/2 = 4...   Answer option (A+B)/2.
<result>D</result>
M is the set of all consecutive odd integers between A and B. If B>A>1, and both A and B are even integers, what is the average (arithmetic mean) of M?