In what time a sum of money double itself at 7% per annum simple interest?\nOptions:\n(A) 33 1/8%\n(B) 33 1/3%\n(C) 14 2/7%\n(D) 32 1/3%\n(E) 23 1/3% OK. Let's think. Some random thoughts first:
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P = (P*7*R)/100\nR = 14 2/7% The answer: (C).
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