SSC CGL Tier II (JSO) 4 March 2023 Paper

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Question : 24 of 100

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For the series a, a + d, a + 2d...., a + 2nd, the mean deviation from the mean is:

$2d\;{(n\;+\;1)}/{2n\;+\;1}$
$d\;{n(n\;+\;2)}/{2n\;+\;1}$
$d√{\;{n(n\;+\;1)}/{2n\;+\;1}}$
$d\;{n(n\;+\;1)}/{2n\;+\;1}$

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