Question
Download Solution PDFप्रथम 10 सम प्राकृत संख्याओ का माध्य है
This question was previously asked in
Bihar STET TGT (Maths) Official Paper-I (Held On: 04 Sept, 2023 Shift 2)
Answer (Detailed Solution Below)
Option 2 : 11
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Bihar STET Paper 1 Mathematics Full Test 1
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Download Solution PDFप्रयुक्त संकल्पना:
माध्य = प्रेक्षणों का योग/ प्रेक्षणों की कुल संख्या
प्रथम n पदों का योग n(n + 1)/2 है
गणना:
प्रथम दस सम संख्याएँ 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 हैं
माध्य = 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20/ 10
2(1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10)/10 = 2 × 10(10 + 1)/(2 × 10) = 11
अतः, सही उत्तर 11 है।
Last updated on Jan 29, 2025
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