The average of $x$ numbers is $y^2$ and the average of $y$ numbers is $x^2$. So the average of all the numbers taken together is
Options:
A . $(x^3+y^3)/\text"x+y"$
B . $xy$
C . $(x^2+y^2)/\text"x+y"$
D . $xy^2+yx^2$
Answer: Option B Answer: (b) According to the question, Average of x number is y2 ∴ Sum of x number is = xy2 Average of y number is = x2 ∴ Sum of y number is = yx2 Average of all number is = ${xy^2+yx^2}/{x+y}$ = ${xy(x+y)}/{x+y}$ = xy
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