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Mr. Thomas invested ₹13,900 in two schemes A and B at SI rates 14% p.a. and 11% p.a. respectively. Total SI earned in 2 years = ₹3,508. Find amount invested in Scheme B.

1. ₹6,400
2. ₹7,200
3. ₹6,500
4. ₹7,500

Correct answer: ₹6,400

Solution

Let B=amount in scheme B. A=13900-B. SI=2[14%(13900-B)+11%B]=3508. 2[1946-0.14B+0.11B]=3508. 1946-0.03B=1754. 0.03B=192. B=₹6,400.

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