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How to solve this issue?

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by Brent@GMATPrepNow » Mon Apr 22, 2013 6:15 am
The fastest way (for me) is to just count up the squares that require mileages.

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We get [spoiler]15 = A[/spoiler]

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by Anju@Gurome » Mon Apr 22, 2013 10:55 am
Basically the problem is asking how many distinct pairs of cities we can make.
Number of such pairs = number of ways to select 2 cities from 6 = 6C2 = 6*5/2 = 15
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by btgsnt » Tue Apr 23, 2013 7:37 am
Thank you both
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