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For yes/no DS questions, the correct answer is definitely yes or definitely NO .

Statement 1 is a define No while statement 2 is a definite yes. so the correct answer should be D

Hi Aussy

Statement 2 is actually NOT a definite yes. Its given that |a/b| > 0 or modulus of a/b is positive. For any non-zero number, its modulus will be positive only.

We can have say a=b=2, and so a/b = 2/2 =1 and |a/b| = 1. Here a/b > 0 and |a/b| is also > 0

But we can also have say a=-2 and b=2 and so a/b = -2/2 = -1 but |a/b| = 1. So here a/b < 0 but |a/b| >0

So we can't say whether a/b will be positive or negative on the basis of second statement.

Also in GMAT, whenever the answer is D, both statements give the same answer. So its NOT possible to get No from statement 1 and Yes from statement 2. If I ever come across such a case in my practice (different answers from the two statements) I know I am going off somewhere and I recheck.

From statement A, A+B=0, we could have A=B=0, So 0/0 ---Undefined ..... We don't know its +ve or -ve. Can we definitely arrive at a conclusion?[/quote]

Hi

Chetan will be best to answer this, but in my opinion, even if its not specified, we can ignore such things where we know its undefined. so eg - if its given that x/y > 2, we have to assume y not equal to 0, because otherwise the question stem becomes not defined. Similarly here I think we can safely assume that A and B will not be 0, because then A/B will become undefined.