The mean and variances of 10 values of a variables x are 0 and ${ \sigma }^{ 2 }$. If the variable $y={ 5x }^{ 2 }$ then mean of y is:
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The mean and variances of 10 values of a variables x are 0 and ${ \sigma }^{ 2 }$. If the variable $y={ 5x }^{ 2 }$ then mean of y is: