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8. The ratio of incomes of two persons is 9:7 and the ratio of their expenditure is 4:3. If each of themsaves Rs.2000 per month, find their monthly incomes |
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Answer» Let the incomes be 9x and 7xLet the expenditures be 4y and 3y Savings = Income - ExpenditureFor 1st person, 2000 = 9x - 4y ... (a)For 2nd person, 2000 = 7x - 3y .... (b)Multiplying (a) by 3 and (b) by 46000 = 27x - 12y8000 = 28x - 12ySubtracting these,-2000 = -xx = Rs. 2000Monthly income of 1st and 2nd person is 9x = Rs. 18000 and 7x = Rs. 14000 respectively. |
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