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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class11  >>  Statistics
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Q)

Correlation coeffiecient between $x$ and $y$ is $0.5 \: cov ( x,y )=8$ and $\sigma_y=4$ then $ \sigma_x$ is

$\begin {array} {1 1} (A)\;2 & \quad (B)\;6 \\ (C)\;4 & \quad (D)\;None\: of \: these \end {array}$

 

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