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COMBINATION and PROBABILITY - references. If you have

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Re: Combinations, Permutations, and Probability - References [#permalink] New post 25 Dec 2010, 09:07
Hey! Thanks a lot for the effort! What's the source of these questions? Any of them from GMATPrep or Kaplan/MGMAT practice tests???
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 27 Dec 2010, 09:25
Expert's post
gmatdelhi wrote:
Hey! Thanks a lot for the effort! What's the source of these questions? Any of them from GMATPrep or Kaplan/MGMAT practice tests???



Possibly.... these are from before the time we started tagging questions and posts.
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 28 Dec 2010, 13:33
bb wrote:
gmatdelhi wrote:
Hey! Thanks a lot for the effort! What's the source of these questions? Any of them from GMATPrep or Kaplan/MGMAT practice tests???



Possibly.... these are from before the time we started tagging questions and posts.


hello bb,

Where are the materials. I could not find any docs in this page or any links..
I really need those Probability and Combinations docs.Please help..
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 28 Dec 2010, 15:07
Expert's post
jullysabat wrote:
bb wrote:
gmatdelhi wrote:
Hey! Thanks a lot for the effort! What's the source of these questions? Any of them from GMATPrep or Kaplan/MGMAT practice tests???



Possibly.... these are from before the time we started tagging questions and posts.


hello bb,

Where are the materials. I could not find any docs in this page or any links..
I really need those Probability and Combinations docs.Please help..



What docs? There are no docs.
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 28 Dec 2010, 16:22
Possibly.... these are from before the time we started tagging questions and posts.[/quote]

hello bb,

Where are the materials. I could not find any docs in this page or any links..
I really need those Probability and Combinations docs.Please help..[/quote]


What docs? There are no docs.[/quote]

The second post in this page/chain says "thanks for the material" so I was searching for probability/combination material.
pls see the print screen below.
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 29 Dec 2010, 12:16
this is great. thanks
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 15 May 2011, 08:48
thanks so much for sharing this!

Just thought I'd add this link from Khan Academy. I think these walk throughs help explain permutations and combinations as well http://www.khanacademy.org/video/permut ... robability
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 17 Nov 2011, 09:06
Hi all,

@Walker: Many thanks!! I was searching for a good description.
I am struggling with probabilities since...well, since I was at school and during University.
I will go through on this on weekend! :thumbup:

Edit:
Hi all,

I have a problem understanding the probability.

Let us say: In a box, here are 8 Red Ball and 5 White Balls.
How high is the probability to get 2 Red Balls and 2 White Balls?

I have solved this with using the Combinations formula.
p=\frac{n}{N}
n--> 2C8 * 2C5
N--> 4C13
I get 40%.

But is there a other approach?
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 04 Feb 2012, 09:13
Great compilation Walker.... :thumbup: :thumbup:
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 08 Feb 2012, 05:50
Combinations, Permutations, and Probability are definitely my weakness. Thanks for sharing all the information and questions.
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 21 Feb 2012, 16:38
Thank you for sharing this! These are some of my weaknesses and I hope to improve them using your links.
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 22 Feb 2012, 01:05
Thanks. As many here, I have also problems understanding the structure of this kind of question.
But I understand now the combination and permutation topic (thanks to MGMAT book). It is just how you count the ways.
Probability is much harder. Even if it is based on counting / enumeration, it is hard to understand a word question (I mean the translation into math).
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Re: Combinations, Permutations, and Probability - References [#permalink] New post 22 Feb 2012, 08:23
much needed. this is just what i needed. my weakest section on the quan side of the house...
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Re: COMBINATION and PROBABILITY - references. If you have [#permalink] New post 27 Dec 2013, 17:40
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Re: COMBINATION and PROBABILITY - references. If you have   [#permalink] 27 Dec 2013, 17:40
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