1.

If the expenditures in 1996 and 1999 are equal, then the approximate ratio of the income in 1996 and 1999 respectively is?

Answer» Let the expenditure in 1996 = x. Also, let the incomes in 1996 and 1999 be I1 and I2 respectively. Then, for the year 1996, we have: 55 = I1 - x x 100     55 = I1 - 1     I1 = 155x ... (i) x 100 x 100 70 = I2 - x x 100     70 = I2 - 1     I2 = 170x ... (ii) x 100 x 100 From (i) and (ii), we get:     I1 = 155x 100 = 155 0.91 9 : 10. I2 170x 100 170 1


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