If the average of the 1st and the 2nd of three numbers is D more th – McqOptions

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1.	If the average of the 1st and the 2nd of three numbers is D more than the average of the 2nd and 3rd number, what is the difference between the 1st and the 3rd number ?
A.	11
B.	13
C.	15
D.	18
Answer» E.

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