RPF Constable previous year question
The average marks of 30 students in a class is 60. The average marks of 20 boys among them is 65. Find the average marks of the remaining 10 girls.
Asked in RPF Constable 2025: Shift 22 · Quantitative Aptitude
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Correct answer: (B) 50
Total marks = 30×60 = 1800. Boys' total = 20×65 = 1300. Girls' total = 1800-1300 = 500. Girls' average = 500/10 = 50.
हिंदी में प्रश्न
एक कक्षा के 30 विद्यार्थियों का औसत अंक 60 है। इनमें से 20 लड़कों का औसत अंक 65 है। शेष 10 लड़कियों का औसत अंक ज्ञात करें।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 50
कुल अंक = 30×60 = 1800। लड़कों का कुल = 20×65 = 1300। लड़कियों का कुल = 1800-1300 = 500। लड़कियों का औसत = 500/10 = 50।
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