SSC CHSL Tier-1 previous year question
A container holds 50 liters of milk. 5 liters are removed and replaced with water, twice in succession. How much pure milk remains?
Asked in SSC CHSL Tier-1 (13 Nov 2025 Shift 3) · Quantitative Aptitude
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Correct answer: (C) 40.5 liters
Using the repeated-dilution formula: remaining milk = 50×(1−5/50)² = 50×(0.9)² = 50×0.81 = 40.5 liters.
हिंदी में प्रश्न
एक बर्तन में 50 लीटर दूध है। 5 लीटर निकालकर पानी से बदला जाता है, यह प्रक्रिया दो बार दोहराई जाती है। कितना शुद्ध दूध शेष रहेगा?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 40.5 लीटर
पुनरावृत्त तनुकरण सूत्र से: शेष दूध = 50×(1−5/50)² = 50×0.81 = 40.5 लीटर।
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