Question
Download Solution PDF8 संख्याओं का औसत 30 है। इन 8 संख्याओं में से प्रथम दो संख्याओं का औसत 26 और अगली तीन संख्याओं का औसत 28 है। छठी संख्या, सातवीं संख्या से 3 कम है तथा आठवीं संख्या से 5 कम है। आठवीं संख्या ज्ञात कीजिए।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFप्रयुक्त सूत्र:
औसत = मानों का योग/मानों की संख्या
गणना:
8 संख्याओं का योग = 8 × 30 = 240
पहली दो संख्याओं का योग = 2 × 26 = 52
अगली तीन संख्याओं का योग = 3 × 28 = 84
माना 6वीं संख्या 'x' है।
⇒ 7वीं संख्या = x +3
⇒ 8वीं संख्या = x + 5
प्रश्नानुसार,
⇒ 52 + 84 + x + x + 3 + x + 5 = 240
⇒ 3x = 240 - 144
⇒ x = 96/3 = 32
∴ आठवीं संख्या = X + 5 = 32 + 5 = 37.
Last updated on Jun 27, 2025
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