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Sapna invested ₹21,500 on simple interest, partly at 13% per annum and partly at 7% per annum. If she earns equal interests from the two in…

358764Medium DSSSB TGT Computer Science 0 replies 0 views
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Sapna invested ₹21,500 on simple interest, partly at 13% per annum and partly at 7% per annum. If she earns equal interests from the two investments after 6 years, then find the sum invested at 13% per annum (in ₹).
  • A7,524
  • B7,527
  • C7,525
  • D7,526
Correct answer: C

Explanation

For equal interests, 13% × x = 7% × (21500 – x). So 13x = 7 × 21500 – 7x, 20x = 150500 and x = ₹7,525.

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