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The average of x numbers is y2 and the average of y numbers is x2. So the average of all the numbers taken together is
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x3 + y3 x + y - xy
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x2 + y2 x + y - xy2 + yx2
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Correct Option: B
Total sum of x numbers = xy2
Total sum of y numbers = yx2
| ∴ Required average = | |
| x + y |
| ∴ Required average = | = xy | |
| x + y |
Second method to find the required average ,
Here, n1 = x, a1 = y2
n2 = y, a2 = x2
| ∴ Average = | |
| n1 + n2 |
| Average = | |
| x + y |
| Average = xy |  |  | = xy | |
| x + y |
