Percentage practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
A person's income increases by 25% and his savings increase by 40%. If his expenditure increases by 20%, what percentage of his original income did he save?
एक व्यक्ति की आय में 25% और उसकी बचत में 40% की वृद्धि होती है।
यदि उसके व्यय में 20% की वृद्धि होती है, तो वह अपनी मूल आय का कितने प्रतिशत बचाता था?
Answer and explanation are free to read — no sign-in required.उत्तर और व्याख्या पढ़ने के लिए साइन-इन आवश्यक नहीं है।
Correct Answerसही उत्तर
B. 25% / 25%
Explanationव्याख्या
Let original income = 100 and savings = x.
Expenditure = 100 − x.
New income = 125, new savings = 1.4x and new expenditure = 1.2(100 − x).
So 1.4x + 1.2(100 − x) = 125.
Solving gives x = 25.
मूल आय 100 और बचत x मानें।
व्यय = 100 − x।
नई आय 125 होगी।
समीकरण 1.4x + 1.2(100 − x) = 125 हल करने पर x = 25 मिलता है।
अतः मूल बचत 25% थी।
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