दो संख्याओं A तथा B का औसत 20, B � – McqOptions

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1.	दो संख्याओं A तथा B का औसत 20, B तथा C का औसत 19 और C तथा A का औसत 21 है \| A का मान क्या है ?
A.	23
B.	56
C.	22
D.	78
Answer» D. 78

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