Percentage practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
A person's income is increased by 20%. His savings increase by 50%, while his expenditure increases by 10%. What percentage of his original income did he save?
Correct Answerसही उत्तर
B. 25% / 25%
Explanationव्याख्या
Let original income = 100 and savings = x.
Expenditure = 100 − x.
New income = 120, new savings = 1.5x and new expenditure = 1.1(100 − x).
Thus 1.5x + 1.1(100 − x) = 120.
Solving gives 0.4x = 10, so x = 25.
Hence original savings were 25% of income.
मूल आय 100 और बचत x मानें।
व्यय = 100 − x।
नई आय 120 होगी।
समीकरण 1.5x + 1.1(100 − x) = 120 से x = 25 प्राप्त होता है।
अतः मूल बचत आय का 25% थी।
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