by tim Wed Apr 25, 2012 5:37 pm
tell us why you think the answer is "cannot be determined" and we'll help you find the flaw in that reasoning. otherwise, the answer in the book should help you see why this has to be negative..
Tim Sanders
Manhattan GMAT Instructor
Follow this link for some important tips to get the most out of your forum experience:
https://www.manhattanprep.com/gmat/forums/a-few-tips-t31405.html