The mean of 12 items is \( \Large  \bar{X} \) . If the first term is increased by 1, second by 2 and so on, then the new mean is

A) \( \Large \overline{X}+n \)
B) \( \Large \overline{X}+\frac{n}{2} \)

C) \( \Large \overline{X}+\frac{n+1}{2} \)
D) none of these

Correct answer:
C) \( \Large \overline{X}+\frac{n+1}{2} \)


Please provide the error details in above question

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