amontobin wrote:What is the value of xy?
(1) x=3/y
(2) (xy)^2 = 9
Statement 1: x = 3/y
Multiplying both sides by y, we get:
xy = (3/y)(y)
xy = 3.
SUFFICIENT.
Statement 2: (xy)² = 9
Here, it's possible that xy = 3 or that xy = -3.
Since xy can be different values, INSUFFICIENT.
The correct answer is
A.
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