Why is it not A?
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Source: Beat The GMAT — Data Sufficiency |
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Ashujain
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Striver wrote:GMAC PRACTICE TEST
Is XY + XZ = 0?
(1) X = 0
(2) Y+Z = 0
We can rephrase the question as X(Y+Z)=0---->X=0 or Y+Z=0?
So if we can find out either of the above or both or none then we can answer this question.
Because if either of them is true then our answer will be YES
or if both of them are true then our answer will be YES
or if neither of them is true then our answer will be No
St1) X=0---> sufficient
St2) Y+Z=0---> suficient
Hence IMO D
