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Susan invested certain amount of money i...

Susan invested certain amount of money in two schemes A and B which offer interest at the rate of 8% per annum and 9% per annum, respectively. She received Rs. 1860 as annual interest. However had she interchanged the amount of investments in the two schemes, she would have received Rs. 20 more as annual interest. How much money did she invest in each scheme?

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The correct Answer is:
Amount invested in scheme A is Rs. 12,000 and scheme B is Rs. 10,000
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