SSC GD Constable previous year question
The average age of 30 students in a group is 18 years. When the teacher's age is included, the average age of the group increases by 1 year. What is the age (in years) of the teacher?
Asked in SSC GD Constable 2025: 05 Feb 2025 Shift 2 (Afternoon) · Quantitative Aptitude
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Correct answer: (C) 49
Total age of 30 students = 540. New average (31 people) = 19, so new total = 589. Teacher's age = 589 − 540 = 49.
हिंदी में प्रश्न
एक समूह में 30 विद्यार्थियों की औसत आयु 18 वर्ष है। जब शिक्षक की आयु शामिल की जाती है, तो समूह की औसत आयु 1 वर्ष बढ़ जाती है। शिक्षक की आयु (वर्ष में) कितनी है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 49
30 विद्यार्थियों की कुल आयु = 540। नई औसत (31 व्यक्ति) = 19, अतः नया कुल = 589। शिक्षक की आयु = 589 − 540 = 49।
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