The mean of the set of numbers \( x_{1}, x_{2}, x_{3}, \ldots \ldot...

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The mean of the set of numbers \( x_{1}, x_{2}, x_{3}, \ldots \ldots . x_{n} \) is \( \bar{x} \), then the mean of the numbers \( x_{i}+2 i, 1 \leq i \leq n \), is
(A) \( \bar{x}+2 n \)
(B) \( \bar{x}+n+1 \)
(C) \( \bar{x}+2 \)
(D) none of these
\( \mathrm{P} \)
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