Probability on QR...what do I need to know?

[eaemdterps3]

hey guys, I take my test on thursday and I think I'm pretty good with most stuff, but one problem I've been having is anything to do with probability in the QR section. From anyone who has taken the dat, or anyone who knows, what probability stuff do I need to know for the exam? Do I need to know permutations (whatever they are) or can I get by know the basic rules and stuff?

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[Kingsta2426]

You should definitely know how to do permutations and combinations.