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x is not equal to y

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Master | Next Rank: 500 Posts
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by uptowngirl92 » Sun Nov 01, 2009 2:46 pm
x-y/x+y>1
x-y>x+y
y>0
So basically the question is asking whether y>0.Then why is'nt B the answer?
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Source: — Data Sufficiency |
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by rohan_vus » Sun Nov 01, 2009 2:58 pm
stmnt (1), x > 0..substitute the values

x = 2, y = 3 => -1/5 < 1 ..
x = 3, y = -2,=> 5/1 > 1.. not sufficient

stmnt (2) y < 0

consider x = 3 , y = -2 => 5 > 1
x = 3 , y = -4 => -7 < 1
not sufficient

combining both stmnts also , same..insuffcient.. IMO E
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by life is a test » Mon Nov 02, 2009 7:27 am
imo e

the question can be reduced to -2y/(x+y) > 0?

if y<0 then you can certainty say that numerator will be >0 but whether or not the denominator is >0 or not will be depend on the actual value of x and y hence insuff.
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