1.

If x and y are uncorrelated variables and if U=x+y and V=x-y, then e(u,v) is equal to

Answer»

`(SIGMA X^(2)+sigma^(2))/(sigma x^(2)-sigmay^(2))`
`(sigma x^(2)-sigma y^(2))/(sigma x^(2)+sigma y^(2))`
`(sigma x^(2)+sigma y^(2))/(sigma x sigma y)`
`(sigma x sigma y)/(sigma x^(2)+sigma y^(2))`

ANSWER :B


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