Give stream of consciousness and then the final answer. The average of 15 result is 60. Average of the first 10 of them is 10 and that of the last 10 is 80. Find the 8th result?\nOptions:\n(A) 35\n(B) 200\n(C) 150\n(D) 250\n(E) 300
User
Sum of all the 13 results = 15 * 60 = 900\nSum of the first 7 of them = 10 * 10 = 100\nSum of the last 7 of them = 10 * 80 = 800\nSo, the 8th number = 900 + 100 - 800 = 200.
The final answer: (B).
Assistant