Need help for this as well.
Is ab < 0 ???
1) (a/b) > 1
2) a > 0
Please help solve this.
S2 is clearly insufficient alone. From S1, we know that a/b is positive. If a/b is positive, then a and b must have the same sign - both positive or both negative. Either way, ab is also positive, so we can answer the question: the answer is 'no'. A.
Nov 2011: After years of development, I am now making my advanced Quant books and high-level problem sets available for sale. Contact me at ianstewartgmat at gmail.com for details.
Private GMAT Tutor based in Toronto