SSC GD Constable previous year question
In 25 consecutive natural numbers, the average of the last 13 numbers is 39. What is the average of all 25 numbers?
Asked in SSC GD Constable 2024: 24 Feb 2024 Shift 3 · Quantitative Aptitude
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Correct answer: (A) 33
With numbers n to n+24, the last 13 (n+12 to n+24) average n+18=39 ⟹ n=21. Average of all 25 = n+12 = 33.
हिंदी में प्रश्न
25 क्रमागत प्राकृत संख्याओं में, अंतिम 13 संख्याओं का औसत 39 है। सभी 25 संख्याओं का औसत कितना है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 31
With numbers n to n+24, the last 13 (n+12 to n+24) average n+18=39 ⟹ n=21. Average of all 25 = n+12 = 33.
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