Use some thinking to answer the following question. X can finish a work in 18 days. Y can finish the same work in 15 days. Yworked for 5 days and left the job. how many days does X alone need to finish the remaining work?\nOptions:\n(A) 12\n(B) 5\n(C) 6\n(D) 8\n(E) 9
User
Work done by X in 1 day = 1/18\nWork done by Y in 1 day = 1/15\nWork done by Y in 5 days = 5/15 = 1/3\nRemaining work = 1 – 1/3 = 2/3\nNumber of days in which X can finish the remaining work = (2/3) / (1/18) = 12 So the final answer is (A).
Assistant