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2014-08-20T16:52:08+05:30

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I suppose in the question, the Income is raised by 10 AND NOT by 10%

Income = H  units

As expenditure : Savings = 3:5  or  3 / (3+5)  :  5 / (3+5)    =  3/8  :  5/8

Expenditure = H * [ 3 / (3+5)  ]  =  3 H / 8  units
Savings = 5 H / 8  units

Now, Income is raised by 10 and NOT 10%, So  New income is = H + 10 units
Expenditure =  same = 3 H / 8 units
Savings = H+10 - 3H/8 = 5H/8 + 10

New ratio of expenditure to savings

[ 3H/8 ]  /  [ 5H/8 + 10 ]         multiply numerator & denominator by 8

3 H / [ 5H + 80 ]

1 5 1