तीन संख्याओं का औसत 15 है यद� – McqOptions

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1.	तीन संख्याओं का औसत 15 है यदि उनमें से दो संख्याएँ 7 तथा 28 है तीसरा संख्या क्या है ? [ UDC 1994]
A.	5
B.	14
C.	10
D.	21
Answer» D. 21

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