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Question
Suman saves 10% of her monthly salary. Now her expenditure increases by 30% and savings increases by 50%. The present increase in her salary is
Options
25%
30%
32%
40%
Solution
32%
Explanation:
Let initially salary of suman is ₹ x.
then, saving of suman `="x"xx10/100=0.1"x"`
expenditure of suman`="x"xx90/100=0.9"x".`
Now, saving of suman = 0.1x × 1.5 = 1.15x
expenditure of suman = 0.9x × 1.3 = 1.17x
New salary = (1.17 + 0.15)x = 1.32x,
Percentage increase in salary
`=((1.32"x"-"x"))/"x"xx100=32%`
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