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Source: — Data Sufficiency |
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by gmatmachoman » Sun Jul 11, 2010 12:20 am
vijaynarayanan wrote:Image


I feel the answer should be C. Can anyone explain why it is B
St 1:

1 is in S

so -1 will also be in the set. Fine..Biu what abt -4?? No idea..Insuffcien

St 2: 2 is in the set

So -2 is in the set

2* -2 = -4 is also in the set....

Pick B
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