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Number properties guide question - positive/negative

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rachita.verma
 Post subject: Number properties guide question - positive/negative
 Post Posted: Fri Apr 06, 2012 3:35 am 
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Students


Posts: 1
-x
--------
(-y)(-z) , given that xyz > 0

The answer in the book is 'Negative'. I think that the answer should be 'Cannot be determined'.

Please help!
Thanks
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tim
 Post subject: Re: Number properties guide question - positive/negative
 Post Posted: Wed Apr 25, 2012 5:37 pm 
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ManhattanGMAT Staff


Posts: 4404
Location: Southwest Airlines, seat 21C
tell us why you think the answer is "cannot be determined" and we'll help you find the flaw in that reasoning. otherwise, the answer in the book should help you see why this has to be negative..

_________________
Tim Sanders
Manhattan GMAT Instructor
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