Question
Download Solution PDFसंख्याए 3, 5, 7 तथा 9 की बारंबारत क्रमश X - 2, X + 2, X + 3 तथा 3 है यदि माध्य 6.5 हो तो X का मान 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 1 : 3
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Bihar STET Paper 1 Mathematics Full Test 1
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Download Solution PDFअवधारणा -
माध्य = (प्रत्येक संख्या का योग * उसकी बारंबारता) / कुल बारंबारता
स्पष्टीकरण -
6.5 = [3*(X - 2) + 5*(X + 2) + 7*(X + 3) + 9*3] / [(X - 2) + (X + 2) + (X + 3) + 3]
समीकरण को हल करने पर हमें प्राप्त होता है:
6.5 x [(3X + 6)] = 15X + 52
19.5X + 39 = 15X + 52
4.5 X = 13
X = 13/4.5 = 130/45 ~ 3
अतः X का मान 3 होगा।
Last updated on Jan 29, 2025
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