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A man spends 75% of his income. If his income rises by 20% and expenses by 10%, his savings rise by:
A40%
B60%
C50%
D30%
Answer & Solution
Correct answer: C. 50%
1. Let income = 100. Savings = 25 (since 75 is spent).
2. New income = 120. New expenses = 75 * 1.10 = 82.5.
3. New savings = 120 - 82.5 = 37.5.
4. Increase in savings = 37.5 - 25 = 12.5.
5. Percent increase = (12.5 / 25) * 100 = 50%.
6. So savings rise by 50%.
_Source: SSC CGL Quantitative Aptitude (Percentages), R.S. Aggarwal style and standard practice_
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