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      Question

      A man deposited Rs. 12000 at 10% compound interest,

      compounded annually while Rs. 10500 at 13% simple interest per annum. What will be the difference between the compound interest and the simple interest earned by him after 3 years?
      A Rs. 123 Correct Answer Incorrect Answer
      B Rs. 161 Correct Answer Incorrect Answer
      C Rs. 164 Correct Answer Incorrect Answer
      D Rs. 220 Correct Answer Incorrect Answer

      Solution

      Compound interest earned by the man in 3 years = 12000 × {(1 + 10/100)3 – 1)} = 12000 × 0.331 = Rs. 3972 Simple interest earned by the man in 3 years = 10500 × 0.13 × 3 = Rs. 4095 Required difference = 4095 – 3972 = Rs. 123

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