probability - permutation - combination -- driving me crazy - The Beat The GMAT Forum

Can somebody suggest me easier non-confusing ways to go learn and work on problems related to probability and permutations and combinations.
I have been trying various text books, working on the problems in those books. But somehow everything seems to become confusing once I get a probability/permutation/combination problem all of a sudden in my Quant section.
The problem seems that I have learned different ways of approaching a problem - using formulas, direct calculation, finding out combinations or permutations manually, etc....but it gets confusing once a problem hits me in the face.
NEED THE SUGGESTION DESPERATELY AND THE POINTERS FOR THE RIGHT KIND OF STUFF TO SOLVE MY DILEMMA

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ranell: Master | Next Rank: 500 Posts; Posts: 224; Joined: Mon May 04, 2009 2:44 pm; Location: Russia, Moscow; Thanked: 10 times; GMAT Score:730

by ranell » Sun Aug 30, 2009 1:56 pm

You should learn combinatorial theory. There are a lot of books on the subject

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kauldheeraj: Senior | Next Rank: 100 Posts; Posts: 34; Joined: Thu Jul 30, 2009 6:14 pm; Thanked: 3 times

by kauldheeraj » Sun Aug 30, 2009 10:59 pm

Can you suggest some online reference? I have my test less than a month away, so am a bit wary about selecting the right material.

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