The average of 25 results is 18; that of first 12 is 14 and of the las – McqOptions

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1.	The average of 25 results is 18; that of first 12 is 14 and of the last 12 is 17, their thirteenth result is:
A.	78
B.	85
C.	28
D.	72
Answer» B. 85

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