A) 10%
B) 6%
C) 5%
D) 4%
Correct Answer: A
Solution :
[a] Let the original income per year = Rs. x \[\therefore \] Savings = 20% of \[x=\frac{20}{100}x\] After increase his new income \[=x+\frac{10}{100}x=\frac{110}{100}x\] New saving = 20% of \[\frac{110}{100}x=\frac{20}{100}\times \frac{110}{100}x=\frac{22}{100}x\] Increase in savings \[=\frac{22}{100}x-\frac{20}{100}x=\frac{2}{100}x\] \[\therefore \] % increase \[=\frac{\frac{2}{100}x}{\frac{20}{100}x}\times 100%=10%\]You need to login to perform this action.
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