SSC CGL Tier-II practice question
Two numbers are in the ratio 7:4. If each number is increased by 15, the ratio becomes 5:3. Find the smaller of the two original numbers.
From a SSC CGL Tier-II Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (C) 120
Let numbers be 7k,4k. (7k+15)/(4k+15)=5/3 → 21k+45=20k+75 → k=30. Smaller=4×30=120.
हिंदी में प्रश्न
दो संख्याओं का अनुपात 7:4 है। यदि प्रत्येक संख्या में 15 जोड़ा जाए, तो अनुपात 5:3 हो जाता है। दो मूल संख्याओं में से छोटी संख्या ज्ञात कीजिए।
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सही उत्तर: (C) 120
मान लीजिए संख्याएँ 7k,4k हैं। (7k+15)/(4k+15)=5/3 → 21k+45=20k+75 → k=30। छोटी संख्या=4×30=120।
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