छः प्रेक्षणों का औसत 12 है | ए – McqOptions

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1.	छः प्रेक्षणों का औसत 12 है \| एक नये प्रेक्षण के सम्मिलित किये जाने से औसत एक कम हो जाता है \| सातवां प्रेक्षण क्या है ?
A.	4
B.	7
C.	5
D.	9
Answer» D. 9

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