jimmyjamesdonkey wrote:

Are x and y both positive?

1) 2x - 2y = 1

2) x/y > 1

OA to follow.

I get C.

1) can be written as 2(x-y)=1

(x-y)=1/2 clearly insuff we dont know if x or y is positive or negative

2) x/y> 1 again insuff either both are positive or negative but they have the same sign..for sure..

combined

we know that x and y have the same sign..then (x-y)=1/2 which means means that for x to be negative y has to be negative..

lets pick a value..x=-2 or some value then y has to be fraction..if y is a fraction then its magnitude has to be greater than x..cant be possible..and x/y has to be greater than 1..

its clear that x and y are both positive..sufficient