Question: The average of six results is 15 and that of the first five is 13. The sixth result is?\nOptions:\n(A) 20\n(B) 25\n(C) 15\n(D) 22\n(E) 18 Let's think first. Some random reasoning:
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6 * 15 â€“ 5 * 13 = 25 The final answer: (B).
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