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Why is it not A?

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Source: — Data Sufficiency |
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by hey_thr67 » Wed May 30, 2012 7:55 pm
IMO is D... what is the OA ( original answer)
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by hey_thr67 » Wed May 30, 2012 7:55 pm
IMO is D... what is the OA ( original answer)
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by Ashujain » Thu May 31, 2012 3:43 am
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
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by Striver » Tue Jun 05, 2012 5:32 pm
The answer was E.
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