The mean of the series \[a,a+nd,\,\,a+2nd\] is [DCE 2002]

1.	The mean of the series \[a,a+nd,\,\,a+2nd\] is [DCE 2002]
A.	\[a+(n-1)\,d\]
B.	\[a+nd\]
C.	\[a+(n+1)\,d\]
D.	None of these
Answer» C. \[a+(n+1)\,d\]

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The mean of the series \[a,a+nd,\,\,a+2nd\] is [DCE 2002]

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