Operation

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Operation

by gmat740 » Sat Aug 15, 2009 10:24 am
[spoiler]IMO-D
OA-E[/spoiler]
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by Morgoth » Sat Aug 15, 2009 11:07 am
I agree answer should be D

question is must be true, hence x could be any positive or negative value and z could be any value greater than 1

In I the question is assuming x=z, which is not stated anywhere in the question.

what is the source?

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by niraj_a » Sat Aug 15, 2009 2:48 pm
i concur with morgoth.

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by gmat740 » Sat Aug 15, 2009 7:03 pm
Thanks Guys....The source is not the official one. An Indian GMAT preparation book of a local publisher, so even I doubt the source.