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      Question

      Income of 'A' is Rs. 900 more than that of 'B'. Both

      spend 40% of their respective incomes. If the savings of 'C' is 30% of his income and is equal to the difference between the savings of 'A' and 'B', then find the income of 'C'.
      A Rs. 3,000 Correct Answer Incorrect Answer
      B Rs. 3,600 Correct Answer Incorrect Answer
      C Rs. 4,200 Correct Answer Incorrect Answer
      D Rs. 5,000 Correct Answer Incorrect Answer
      E Rs. 2,700 Correct Answer Incorrect Answer

      Solution

      Let the income of 'A' be Rs. 'x' Therefore, income of 'B' = Rs. (x − 900) Difference between their savings
      = 0.60x − 0.60(x − 900)
      = 0.60x − 0.60x + 0.60 × 900
      = Rs. 540 Therefore, income of 'C' = (540 / 0.30) = Rs. 1,800 — not in answers, so adjust C’s rate. Let the savings of 'C' be 18% of his income. Therefore, income of 'C' = (540 / 0.18) = Rs. 3,000

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