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GMAT prep DS question

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Source: — Data Sufficiency |
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Re: GMAT prep DS question

by iamcste » Mon Apr 20, 2009 7:01 pm
mlane25269 wrote:Can someone explain? Thanks!
X=22, Y=-4 , X+Y<20 and X>20
X=18, Y=1, , X+Y<20 and X<20
Hence x can be greater than or less than 20
Insufficient

2. No info about X,Insufficient

Together,
X+Y<20
Y<20
In both test data above, Y <20 and X+Y<20
Hence collectively insufficient, Choose E
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