The average of ten numbers is 210. The average of first five numbers is 40 and the average of last four numbers is 200. What is the middle number?\nOptions:\n(A) A) 200\n(B) B) 2000\n(C) C) 800\n(D) D) 2100\n(E) E) 1100 Hmmm, my stream of consciousness:
User
The total of ten numbers = 10X210 = 2100\nThe total of first 5 and last 4 numbers is = 5 X 40+4 X 200 = 1000\nSo, the middle number is (2100 - 1000 ) = 1100 So, the answer is (E).
Assistant