yezz wrote:

rephrasing the question is x-y/x+y > 1 ie : is x-y > x+y ps: ( x+ y can not be zero)

This is wrong. We don't know the sign of (x+y) so you can not multiply. If x+y is -ve then the sign of equality should be reversed.

Answer should be E.

Here is the explanation:

Question:Is (x-y)/(x+y) >1 ?

Lets draw a matrix

x-------y-------------answer to above question

pos---pos------------------always less than 1.

pos---neg------------------may be less or greater depending on values of x and y

neg---pos------------------may be less or greater depending on values of x and y

neg---neg----------------- always less than 1.

St1: x>0: Look at choices 1 and 2: INSUFF

St2: y<0: Look at choices 2 and 4: INSUFF

Combined: x> 0 and y <0: Look at choice 2.: INSUFF

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SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008