A) \[\frac{n+1}{2}\]
B) \[\frac{n}{2}+2\]
C) \[\frac{n-1}{2}\]
D) None of these
Correct Answer: A
Solution :
(a): Mean \[=\frac{\sum{n}}{n}=\frac{n(n+1)/2}{n}=\frac{(n+1)}{2}\]
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