X can finish a work in 25 days. Y can finish the same work in 20 days. Y worked for 12 days and left the job. how many days does X alone need to finish the remaining work?\nOptions:\n(A) 2\n(B) 5\n(C) 6\n(D) 7\n(E) 8 Now, let's think a bit. Some random thoughts:
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Work done by X in 1 day = 1/25\nWork done by Y in 1 day = 1/20\nWork done by Y in 12 days = 12/20 = 3/5\nRemaining work = 1 – 3/5 = 2/5\nNumber of days in which X can finish the remaining work = (2/5) / (1/20) = 8
The final answer: (E).
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