C is obvious ans here.
Either both of 'em have to be positive or negative at the same time to know the ans.
From 1 : x-y>-2
Here we can't find whether (x-y) is positive or negative.
x and ys sign can't be fixed.
From 2 : same as above.
Now combining both we can see both x and y are positive.
from 1:
We have x-y>-2
=>x>y-2
and from 2 : x-2y<-6
=>x<2y-6
so, 2y-6>y-2
=>y>4 and then we can get x is also positive.
gprep ds- can anyone tell me how to solve this quickly
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Source: Beat The GMAT — Data Sufficiency |
