परीक्षाफलो का औसत 18 है उनमे – McqOptions

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1.	परीक्षाफलो का औसत 18 है उनमे से पहले 12 का औसत 14 है और अंतिम 12 का औसत 17 है तेरहवाँ परीक्षाफलो होगा - [ CLERK GRADE, 1993]
A.	72
B.	28
C.	85
D.	78
Answer» E.

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