Haryana Police Female Constable 30 Dec 2018 Paper

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Question : 18 of 100

Marks: +1, -0

The mean of the first 'n' natural numbers is

$\;{n\;+\;1}/{2}$
$\;{n(n\;+\;1)}/{2}$
$\;{n}/{2}$
None of these

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