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Re: how to aproach such questions [#permalink]
07 Apr 2012, 10:47

1

This post received KUDOS

Expert's post

GMATD11 wrote:

Guys I am getting Answer as E

1) x=y but we dont know whether x>y or not 2) ns

1+2)still we dont know whether x>y

If x, y, p, and q are positive, is x>=y?

Question: is x more than or equal to y (is x\geq{y})?

(1) \frac{px}{qy}=\frac{p}{q} --> reduce by \frac{p}{q} --> \frac{x}{y}=1 --> x=y, so we can answer yes to the question: x is equal to y. Sufficient.

(2) xy=p --> Clearly not sufficient (if x, y and p equal to 1, 2, and 2 respectively then the answer is NO but if they equal to 2, 1 and 2 then the answer is YES).