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      Question

      Income of 'M' is 30% more than that of 'N'. 'M' and 'N'

      save 50% and 40% of their respective incomes. If their expenditure difference is Rs. 600, what is the saving of 'M'?
      A Rs.7,800 Correct Answer Incorrect Answer
      B Rs.5,572 Correct Answer Incorrect Answer
      C Rs.10,800 Correct Answer Incorrect Answer
      D Rs.3,250 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the income of 'N' be Rs. '100n'

      Income of 'M' = 1.3 × 100n = Rs. '130n'

      Expenditure of 'M' = 0.5 × 130n = Rs. '65n'

      Expenditure of 'N' = 0.6 × 100n = Rs. '60n'

      So, 65n - 60n = 600

      Or, 5n = 600

      Or, 'n' = 120

      Savings of 'M' = 130n - 65n = 65n = 65 × 120 = Rs. 7,800

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