abypatra wrote:
Did you mean a=b=0 on the 3rd point? YES
So is it correct to say that - in this question, combining both AC, we only get one root of y and hence it is insufficient? (but if the question is considered 'must be true', the y=7 should be sufficient and B could be an answer)?; and if the answer choice A was (y-2)=0, then the answer to the question would have been C?
Thank you
Hi
Quote:
So is it correct to say that - in this question, combining both AC, we only get one root of y and hence it is insufficient? (but if the question is considered 'must be true', the y=7 should be sufficient and B could be an answer)?
the Q is JUST -
Is y=7?--NOTHING about roots
I. tells you x=3, we do not know anything about y.. Insuff
II. tells us (x-3)(y-7)=0..
so different cases..x=3, y can be 7, 0, 1,2 .. so 7 is possible but not MUST--
y=7, x could be anything But suff for us..
so different CASES .. Insuff
combined we know for sure x=3, BUT y can be 7 or any other number..
so Insuff
Quote:
and if the answer choice A was (y-2)=0, then the answer to the question would have been C?
IF statement I was y=2..
ans will be A..
since y=2, it cannot be =7..
so our answer for IS x=7? would be NO