IBPS RRB Office Assistant (Multipurpose) Prelims practice question
The average age of 20 students in a class is 40 years. The average age of 10 teachers is 20 years. Find the average age of all the students and teachers combined.
From a IBPS RRB Office Assistant (Multipurpose) Prelims Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (A) 33.33
Total age = (20x40) + (10x20) = 1000. Combined average = 1000/30 = 33.33 years.
हिंदी में प्रश्न
एक कक्षा के 20 विद्यार्थियों की औसत आयु 40 वर्ष है। 10 शिक्षकों की औसत आयु 20 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: (A) 33.33
कुल आयु = (20x40) + (10x20) = 1000. संयुक्त औसत = 1000/30 = 33.33 वर्ष।
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