Use some thinking to answer the following question. The least number of complete years in which a sum of money put out at 20% C.I. will be more than doubled is?\nOptions:\n(A) 3\n(B) 4\n(C) 5\n(D) 6\n(E) 7
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P(1 + 20/100)n > 2P or (6/5)n > 2\nNow, (6/5 * 6/5 * 6/5 * 6/5) > 2. So, n = 4 years. So the final answer is (B).
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