RRB NTPC CBT-1 previous year question
Find the mean of the following data. Class interval0-88-1616-2424-3232-4040-48 Frequency 4 6 7 3 12 8
Asked in RRB NTPC 2026 — 14 June Shift 2 · Quantitative Aptitude
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Correct answer: (C) 27.4
Using class midpoints (4,12,20,28,36,44) with frequencies (4,6,7,3,12,8), mean = sum(f*x)/sum(f) = 1096/40 = 27.4.
हिंदी में प्रश्न
निम्नलिखित आंकड़ों का माध्य ज्ञात कीजिए। वर्ग अंतराल 0 88 । 1616 2424 । 3232 4040 । बारंबारता 4 6 # 7 3 12
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उत्तर और व्याख्या देखें
सही उत्तर: (C) 25.2
वर्ग मध्यमानों (4,12,20,28,36,44) और बारंबारताओं (4,6,7,3,12,8) का उपयोग करते हुए, माध्य = sum(f*x)/sum(f) = 1096/40 = 27.4 है।
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