@Anurag...
I found this from Master GMAT preparation question and it states the answer as E
Explanation:
"MASTER GMAT:
Correct.Solving this question by any method other than Plugging In would be suicidal.Plug in for statement (1) x=10, z=50, y=10, w=100 to get a "No" answer. Ask yourself if it is always "No". Try different numbers. For instance, x=30, z=20, y=30, w=40. The answer is now "Yes". Therefore, (1) Maybe->Insufficient->BCE.Plug in for statement (2). Try to use the same numbers if you can, to save time and careless errors. There is no definite answer, therefore (2) Maybe->Insufficient->CE.Combining the statements does not make any difference, as the numbers prove. Therefore, (1)+(2) Maybe-> Insufficient->E."
Anurag@Gurome wrote:karthikpandian19 wrote:Is X percent of Y more than Z percent of W?
(1) X percent of Z is one half of Y percent of W.
(2) X=Y and 2·Z=W
Is X% of Y > Z% of W? or is XY > ZW?
(1) X% of Z = (1/2)Y% of W
XZ/100 = YW/200
2XZ = YW; NOT sufficient.
(2) X = Y and 2Z = W
X² > 2Z²; NOT sufficient.
Combining (1) and (2), 2X² = 2XZ or X = Z = Y and W = 2X implies X² > 2X², which is not true. So, the answer to the main question is "No"; SUFFICIENT.
The correct answer is
C.
