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Is y – x positive?

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by sanju09 » Sat Aug 14, 2010 3:44 am
Is y - x positive?

(1) y > 0.
(2) x = 1 - y.


[spoiler]Source: Picked from some source unknown to www.avenuesabroad.org[/spoiler]
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by kvcpk » Sat Aug 14, 2010 4:09 am
sanju09 wrote:Is y - x positive?

(1) y > 0.
(2) x = 1 - y.


[spoiler]Source: Picked from some source unknown to www.avenuesabroad.org[/spoiler]
(1) y > 0.
no info about x. INSUFF
(2) x = 1 - y.
x+y = 1
Let x= 2, y=-1
y-x = negative
Let x= 0.5, y=0.5
y-x is not negative.
Hence INSUFF

Combining:
Let x= 0.5, y=0.5
y-x =0 is not positive.
Let y=1, x=0
y-x = 1 is positive.
INSUFF

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