pinkcupcake wrote:

Hi All,

I know this maybe an easy question, but I don't understand where i'm going wrong.

Does x – y = 200?

(1) x=10^2

(2) x=100 and y=-100

I figured the answer would be D, however the official answer shows as B. Could someone help me explain how the answer is B and not D please?

This is a typical Yes/no Ds question which means expected answer should be either yes or no.

Question is not asking you to Calculate value.

Using 1st statement , you know x=100 but no idea about Y. so insufficient

Using 2nd statement , 100-(-100)=100+100=200 , so you get answer here as YES, x-y =200 so Statement 2 alone suffiecient . (please not if you had got answer as NO , x-y is not equal to 200 then also this statement would be sufficient )

hope this helps

_________________

Press +1 Kudos if you find this Post helpful