The value of quantity X has a percentage uncertainty of 2%.
The value of quantity Y has a percentage uncertainty of 4%.
The value of a quantity W is calculated from the values of X and Y.
The value of W has a percentage uncertainty of 8%.
What could be the relationship between W, X and Y?
1 )
$W = XY$
2 )
$W = 2XY$
3 )
$W = \frac{X}{Y^2}$
$W = \frac{Y}{X^2}$
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