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Question

If x, y are independent variable, then

A
Cov(x,y)=1
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B
rxy=0
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C
rxy=1
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D
Cov(x,y)=0
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Solution

The correct options are
B rxy=0
D Cov(x,y)=0
Fact. If the variables are uncorrelated or independent then covariance
and coefficient of correlation between the variable both are equal to 0
i.e. rxy=Cov(x,y)=0

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