A, B and C can do a work in 8 days, 8 days and 12 days respectively. In how many days can all three of them working together, complete the work?\nOptions:\n(A) 3\n(B) 2 2/8\n(C) 2 2/0\n(D) 2 2/2\n(E) 2 2/1
Let's be accurate as possible. Think before you answer.
(A)
Work done by all three of them in one day = 1/8 + 1/8 + 1/12 = 1/3\nThe number of days required = 3 days.

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Therefore, the answer is (A)