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Q: A sum of money earn a simple interest at 7.5% per annum for the first 6 years, at 9% for the next 6 years, and at 6% for the final 6 years. If the total interest earned during these 18 years was `33,075 ,then what was the original sum invested (in`)?
  • A. 25,400
  • B. 24,050
  • C. 25,040
  • D. 24,500
Correct Answer: Option D -
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Explanations:

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