15 संख्याओं का औसत 7 है। यदि पहली 8 संख्याओं का औसत 6.5 हो और अंतिम 8 संख्याओं का औसत 8.5 हो तो बीच वाली ज्ञात कीजिये ?A. 10B. 23C. 13D. 15

15 संख्याओं का औसत 7 है। यदि प

1.	15 संख्याओं का औसत 7 है। यदि पहली 8 संख्याओं का औसत 6.5 हो और अंतिम 8 संख्याओं का औसत 8.5 हो तो बीच वाली ज्ञात कीजिये ?A. 10B. 23C. 13D. 15
Answer» Correct Answer - D middle number = 8 x 6.5 + 8 x 8.5 - 15 x 7 = 52 + 68 -105 =15

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15 संख्याओं का औसत 7 है। यदि पहली 8 संख्याओं का औसत 6.5 हो और अंतिम 8 संख्याओं का औसत 8.5 हो तो बीच वाली ज्ञात कीजिये ?A. 10B. 23C. 13D. 15

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