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      Question

      The ratio of the incomes of two employees is 7 : 4, and

      the ratio of their expenditures is 3 : 1. If each of them manages to save β‚Ή4,800 per month, find the sum of their monthly incomes (in β‚Ή).
      A 21120 Correct Answer Incorrect Answer
      B 20120 Correct Answer Incorrect Answer
      C 21150 Correct Answer Incorrect Answer
      D 18150 Correct Answer Incorrect Answer

      Solution

      ATQ: (7x - 4800)/(4x - 4800) = 3/1 7x - 4800 = 12x - 14400 5x = 9600 x = 1920 Required sum = 7x + 4x = 11x = 11 Γ— 1920 = 21120Β 

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