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A person invested an amount of ₹2000 partly in a 6% simple interest scheme and the remaining amount in a 7% simple interest scheme. If the total interest obtained after one year is ₹125, find the amount invested in the 6% simple interest scheme.

1. ₹1850
2. ₹1750
3. ₹1500
4. ₹1250

Correct answer: ₹1500

Solution

Let x be invested at 6%, so ₹(2000-x) is invested at 7%. The total one-year interest is $0.06x + 0.07(2000-x)=125$. Solving gives x=1500.

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