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A person invested some amount at the rate of 12% simple interest and a certain amount at the rate of 10% simple interest. He received yearly interest of Rs 130. But if he had interchanged the amounts invested, he would have received Rs 4 more as interest. How much did he invest at 12% simple interest? (a) Rs 400     (b) Rs 500     (c) Rs 700     (d) Rs 800

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RS AGGARWAL-SIMPLE INTEREST-All Questions
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  15. A money lender finds that due to a fall in the annual rate of inter...

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