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The sum of the squares deviations for $10$ observations taken from their mean $50$ is $250 .$ The coefficient of variation is

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Correct option is A

Let x1,x2,…,x10 be 10 observations. Then, ∑i=110 xi−502=250∴ σ2=110∑i=110 xi−502=25010=25⇒σ=5∴ Coefficient of variation =σX¯×100=550×100=10%

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The sum of the squares deviations for 10 observations taken from their mean 50 is 250. The coefficient of variation is

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The sum of the squares deviations for $10$ observations taken from their mean $50$ is $250 .$ The coefficient of variation is