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# xy>0 ? 1) x-y>-2 2) x-2y<-6

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Manager
Joined: 13 Aug 2005
Posts: 136
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xy>0 ? 1) x-y>-2 2) x-2y<-6 [#permalink]  28 Oct 2006, 18:56
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xy>0 ?

1) x-y>-2
2) x-2y<-6
VP
Joined: 28 Mar 2006
Posts: 1384
Followers: 2

Kudos [?]: 19 [0], given: 0

Re: DS inequalities [#permalink]  28 Oct 2006, 20:16
Natalya Khimich wrote:
xy>0 ?

1) x-y>-2-------------------------------(1)
2) x-2y<-6
--------------------(2)

1) is clearly not enough

Also 2 isnt enough

From 1 and 2 we can say its is xy>0

rewrite (2) as
2y-x>6 ------------------(3)

y>4

Substitute this val in (1)

x-y(somevalue>4) >-2

Lets suppose y=4 then x has to be minimum 2

So both are +ve and hence

it is C
SVP
Joined: 01 May 2006
Posts: 1805
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