Hi aviejay,

Based on your approach, you assume that after you divide (re: 120/2 = 60) that exactly half of the 60 remaining options involve situations in which Z is ahead of W. Unfortunately, that is NOT correct (it's actually more than half). Most people would not realize that without actually mapping out all of the options though. To properly do the math, you actually have to do the calculation in a different way (and deal with both 'restrictions' at once, which means that you ultimately divide 120 by 6). I've explained how in an earlier post in this thread.

GMAT assassins aren't born, they're made,
Rich
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