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      Question

      β€˜M’ invested Rs. 6000 in a business. β€˜N’ joined

      x months later with an investment of Rs. 5000. If at the end of the year, N’s share in the profit is Rs. 4000 out of a total profit of Rs. 12000, find the value of x.
      A 4 Correct Answer Incorrect Answer
      B 2 Correct Answer Incorrect Answer
      C 7 Correct Answer Incorrect Answer
      D 3 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      According to the question,
      (6000 Γ— 12) : {5000 Γ— (12 – x)} = (12000 – 4000) / 4000
      Or, 72000 : {5000(12 – x)} = 8000 / 4000
      Or, 72000 : {5000(12 – x)} = 2 : 1
      So, 72000 Γ— 1 = 2 Γ— 5000(12 – x)
      72000 = 10000(12 – x)
      72000 = 120000 – 10000x
      10000x = 120000 – 72000
      10000x = 48000
      x = 4.8 months

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