Q: A, B and C can do a work in 7 days, 8 days and 12 days respectively. In how many days can all three of them working together, complete the work?\nOptions:\n(A) 2 50/59\n(B) 2 5/59\n(C) 2 2/50\n(D) 2 2/59\n(E) 2 1/59 Let's give some random thoughts before answering.
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Work done by all three of them in one day = 1/7 + 1/8 + 1/12 = 59/168\nThe number of days required = 168/59 = 2 50/59 days.
Therefore, the answer is (A).
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