If _ i=1 ^ 10 x_i=110 and _ i=1 ^ 10 x_i^2=1540 then what is the variance?

NDA 2021 Mathematics question

=110 and =1540

then what is the variance?

Answer: (B)

Mean . Variance \frac{\sum x_i^2}{n}\bar$

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Question ID VK-033727