TS ICET 24 May 2019 Shift 1 Paper

Question : 91 of 200

Marks: +1, -0

A spends 70% of his income and saves the rest. If his income increases by 15% and expenses increase by 20% the percentage change in his saving will be:

30%increase
${10}/3 %$ increase
$3/{10}%$ decrease
$1/{10} %$ decrease

Validate

Solution:

Let the original income be 100x
Original expenditure 70x and 30x
New income

=100x×115/100×115x

New expenditure

=70×120/100=84x

New saving

= 115x-84x = 31x.

Percentage increase in saving

x/{30x}×100

=10/3%

increase

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