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JEE MAIN - Mathematics Hindi (2018 (Offline) - No. 9)

यदि $$\sum\limits_{i = 1}^9 {\left( {{x_i} - 5} \right)} = 9$$ और

$$\sum\limits_{i = 1}^9 {{{\left( {{x_i} - 5} \right)}^2}} = 45$$, तो 9 वस्तुओं
$${x_1},{x_2},.......,{x_9}$$ का मानक विचलन है
3
9
4
2

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