Use some thinking to answer the following question. A can do a job in 12 days and B can do it in 15 days. A and B working together will finish twice the amount of work in days?\nOptions:\n(A) 22 1/6\n(B) 22 1/2\n(C) 22 1/0\n(D) 22 1/9\n(E) 13 1/3
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1/12 + 1/15 = 9/60 = 3/20\n20/3 = 20/3 *2 = 13 1/3 days So the final answer is (E).
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