A and B can do a work in 1 day, B and C in 2 days and C and A in 3 days. In how many days will the work be completed, if all three of them work together?\nOptions:\n(A) 12/11\n(B) 12/24\n(C) 13/16\n(D) 18/12\n(E) 14/23 Stream of consciousness first, then make a decision:
User
One day work of A and B = 1/1\nOne day work of B and C = 1/2\nOne day work of C and A = 1/3\n2(A + B + C) = 1/1+ 1/2 + 1/3\n2(A + B + C) = 11/6\n(A + B + C) = 11/12\nNumber of days required = 12/11 days.
Thus, the answer is (A).
Assistant