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Answer the followings questions (any ten) : A sum of money is doubled in 8 years at r% rate of compound interest per annum. At the same rate in how many years it will be four times of the sum?

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UNITED BOOK HOUSE-QUESTION PAPER 2017-Exercise
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  14. If 11, 12, 14, x - 2, x + 4, x + 9, 32, 38, 47 are arranged in ascendi...

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  15. Answer any one question : The difference between simple interest and ...

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