Q: A can do a piece of work in 24 days. B in 15 days and C in 12 days. In how many days can A finish the work if he is assisted by B on one day and C on the next, alternately?\nOptions:\n(A) 8 2/5days\n(B) 10 2/5days\n(C) 6 2/5days\n(D) 18 2/5days\n(E) 17 2/5days Let's give some random thoughts before answering.
User
A + B = 1/24 + 1/15 = 13/120\nA + C = 1/24 + 1/12 = 1/8\n13/120 + 1/8 = 28/120\n4 1/5 days * 2 = 8 2/5days
Therefore, the answer is (A).
Assistant