(1) is obviously NOT SUFFICIENT.
(2) is also NOT SUFFICIENT.
Combining (1) and (2) we have a > 0 or a is positive. But we cannot say anything about b.
If b = positive then x = negative
If b = negative then x = positive
If b = 0 then x = 0
So, nothing can be said about x.
The correct answer is [spoiler](E)[/spoiler].
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Source: Beat The GMAT — Data Sufficiency |
Rahul Lakhani
Quant Expert
Gurome, Inc.
https://www.GuroMe.com
On MBA sabbatical (at ISB) for 2011-12 - will stay active as time permits
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Quant Expert
Gurome, Inc.
https://www.GuroMe.com
On MBA sabbatical (at ISB) for 2011-12 - will stay active as time permits
1-800-566-4043 (USA)
+91-99201 32411 (India)
