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      Question

      Rs. (n + 200) invested on simple interest amounts to Rs.

      2,400 and Rs. 2,880 in 4 years and 6 years, respectively. Find the value of 'n'.
      A 1000 Correct Answer Incorrect Answer
      B 1500 Correct Answer Incorrect Answer
      C 1240 Correct Answer Incorrect Answer
      D 1150 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Interest earned in 2 years = 2,880 - 2,400 = Rs. 480
      Interest earned in 1 year = 480 ÷ 2 = Rs. 240
      Interest earned in 4 years = 240 × 4 = Rs. 960
      So, n + 200 = 2,400 - 960
      Or, n + 200 = 1,440
      Or, n = 1,240

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