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combinations vs. permutations, need good practice set

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Newbie | Next Rank: 10 Posts
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Joined: Fri Nov 23, 2007 7:52 pm
by adambowie » Sat Jul 05, 2008 11:02 am
This may seem a bit silly, but I have having some problems quickly and efficiently determining whether a question is a comb or perm problem. I just need to practice 20-30 problems to get this down cold. Actually solving them is easy for me, just sometimes it just seems order doesn't matter, when it does, and vice-versa. I really just need some practice to get to connect for me.

Can anyone point me to a set of problems or a practice set that would help me with this?

Regards
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