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The average of x numbers is y^(2) and t...

The average of x numbers is `y^(2)` and the average of y numbers is `x^(2)` . Find the average of all the numbers taken together

A

`(x^(3) + y^(3))/(x + y)`

B

xy

C

`(x^(2) + y^(2))/(x + y)`

D

`xy^(2) + yx^(2)`

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