SSC CHSL Tier-1 previous year question
Average age of 20 students is 18. A group of 5 new students joins, raising the average to 20. Find the average age of the new students.
Asked in SSC CHSL Tier-1 (13 Nov 2025 Shift 3) · Quantitative Aptitude
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Correct answer: (C) 28
Total (20 students) = 360. Total (25 students) = 500. New 5 students' total = 500−360 = 140; average = 140/5 = 28.
हिंदी में प्रश्न
20 छात्रों की औसत आयु 18 वर्ष है। 5 नए छात्र जुड़ने पर औसत 20 वर्ष हो जाती है। नए छात्रों की औसत आयु ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 28
कु ल (20 छात्र) = 360। कु ल (25 छात्र) = 500। नए 5 छात्रों का कु ल = 500−360 = 140; औसत = 140/5 = 28.
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