RRB Technician Grade 3 practice question
The average age of 25 students in a class is 30 years. The average age of 15 teachers is 45 years. Find the average age of all the students and teachers combined.
From a RRB Technician Grade 3 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (C) 35.62
Total age = (25x30) + (15x45) = 1425. Combined average = 1425/40 = 35.62 years.
हिंदी में प्रश्न
एक कक्षा के 25 विद्यार्थियों की औसत आयु 30 वर्ष है। 15 शिक्षकों की औसत आयु 45 वर्ष है। सभी विद्यार्थियों और शिक्षकों को मिलाकर औसत आयु ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) ३५.६२
Total age = (25x30) + (15x45) = 1425. Combined average = 1425/40 = 35.62 years.
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