# If variance of a distribution is 841. Find the standard deviation.

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If variance of a distribution is 841. Find the standard deviation.
1. 15
2. 20
3. 29
4. 45

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Correct Answer - Option 3 : 29

Concept;

$\rm S.D = \sqrt {Variance}$

Calculation:

We know,

$\rm S.D = \sqrt {Variance}$

$\rm \Rightarrow S.D = \sqrt {841}$

S.D = 29