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Real GMAT question DS

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Real GMAT question DS

by juan800 » Tue Dec 02, 2008 5:41 pm
Is x+y>0???
i) x(x+y) >0
ii) y(x+y) >0

Please so can solve it?
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by cramya » Tue Dec 02, 2008 5:49 pm
I am getting E). whats the oa?
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by raajan_p » Tue Dec 02, 2008 6:15 pm
Is B not enough?

From B cant we say that Y > 0 and X > -Y(which is wat the question asks?)
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by gmataug08 » Tue Dec 02, 2008 7:03 pm
raajan_p wrote:Is B not enough?

From B cant we say that Y > 0 and X > -Y(which is wat the question asks?)
Can't the same logic be applied for stmt 1 too?

I would go with E
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by cramya » Tue Dec 02, 2008 7:09 pm
Stmt I

x(x+y) > 0

x> 0 or x+y > 0 or both > 0

INSUFF


Stmt II

Y(x+y) > 0

Y> 0 or x+y > 0 or both > 0

INSUFF

Stmt I and II together
x(x+y) > 0
Y(x+y) > 0

Add inequalities facing same direction

x(x+y) + Y(x+y) > 0
(x+y) (x+y) > 0

x+y can be -ve or +ve

INSUFF

E)
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