The mean of the series $a,a + nd,\,\,a + 2nd$ is
The mean of the series $a,a + nd,\,\,a + 2nd$ is
- A
$a + (n - 1)\,d$
- B
$a + nd$
- C
$a + (n + 1)\,d$
- D
None of these
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- [JEE MAIN 2021]
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