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If the standard deviation of data is 12 and mean is 72 , then coefficient of variation is
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$16.67 \%$
$\begin{aligned} & \text { Coefficient of variation }=\frac{\text { Standard Deviation }}{\text { Mean }} \times 100 \\ & \frac{12}{72} \times 100 \%=16.67 \%\end{aligned}$
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