SSC GD Constable previous year question
The average age of 57 students of a class is 13 years. If the teacher's age is also included, the average age of the whole group becomes 14 years. Find the age of the teacher (in years).
Asked in SSC GD Constable 2025: 10 Feb 2025 Shift 2 (Afternoon) · Quantitative Aptitude
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Correct answer: (B) 71
Total age of 57 students = 57×13 = 741. Total for 58 people = 58×14 = 812. Teacher's age = 812−741 = 71 years.
हिंदी में प्रश्न
एक कक्षा के 57 विद्यार्थियों की औसत आयु 13 वर्ष है। यदि शिक्षक की आयु भी सम्मिलित कर ली जाए, तो संपूर्ण समूह की औसत आयु 14 वर्ष हो जाती है। शिक्षक की आयु (वर्ष में) ज्ञात कीजिए।
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सही उत्तर: (B) 71
57 विद्यार्थियों की कुल आयु = 57×13 = 741। 58 लोगों का कुल = 58×14 = 812। शिक्षक की आयु = 812−741 = 71 वर्ष।
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