Q: The average of seven results is 156 and that of the first six is 169. The fifth result is?\nOptions:\n(A) 120\n(B) 160\n(C) 89\n(D) 78\n(E) 148 Let's give some random thoughts before answering.
User
7 * 156 â€“ 6 * 169 = 78
Therefore, the answer is (D).
Assistant