SSC GD Constable previous year question
The average of five numbers is 36. The average of the first two numbers is 1.5 times the average of the last three numbers. What is the sum of the first two numbers?
Asked in SSC GD Constable 2024: 21 Feb 2024 Shift 4 · Quantitative Aptitude
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Correct answer: (D) 90
Total of 5 = 180. With last-three avg=x, first-two avg=1.5x: 3x+3x=6x=180 ⟹ x=30. Sum of first two = 3x = 90.
हिंदी में प्रश्न
पांच संख्याओं का औसत 36 है। प्रथम दो संख्याओं का औसत अंतिम तीन संख्याओं के औसत का 1.5 गुना है। प्रथम दो संख्याओं का योग कितना है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 78
Total of 5 = 180. With last-three avg=x, first-two avg=1.5x: 3x+3x=6x=180 ⟹ x=30. Sum of first two = 3x = 90.
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