The average of 13 numbers is 60. Average of the first 6 of them is 57 and that of the last 8 is 61. Find the 8th number?\nOptions:\n(A) 46\n(B) 48\n(C) 50\n(D) 52\n(E) 54 Hmmm, my stream of consciousness:
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Sum of all the 13 numbers = 13 * 60 = 780\nSum of the first 6 of them = 6 * 57 = 342\nSum of the last 8 of them = 8 * 61 = 488\nSo, the 8th number = 342 + 488 - 780 = 50. So, the answer is (C).
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