RRB NTPC CBT-1 previous year question
The arithmetic mean of 3, 7, 11, ..., 51 is ______.
Asked in RRB NTPC 2026 — 16 June Shift 3 · Quantitative Aptitude
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Correct answer: (D) 27
For an arithmetic progression, the mean equals (first term + last term)/2 = (3+51)/2 = 27.
हिंदी में प्रश्न
3, 7, 11, ..., 51 का समांतर माध्य ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 31
समांतर श्रेणी के लिए, माध्य = (पहला पद + अंतिम पद)/2 = (3+51)/2 = 27 होता है।
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