Hello

Actually it does not depend on the overall percentage ..the best of four would have to be calculated..

And the north/south campus thing would basically depend on the respective cut-offs of colleges  and your choice.

For instance, you may be getting both a north and a south campus college with your best of four percentage, at the same time but it may turn out that the south campus one is better as expected to what you are getting in the north campus.

In this case, you will be having the choice ultimately.

I hope you are getting it.

Good luck