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# Combinations and Probability on real GMAT

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Manager
Joined: 08 Mar 2009
Posts: 185
Combinations and Probability on real GMAT [#permalink]

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20 Mar 2009, 07:17
I am taking up too much time with these questions on practice exams. I am currently trying to work these prblems in timed environment.

However, was wondering if these difficult questions seem to appear always, or less than one might assume....I do not one to become obsessed with one area.
CEO
Joined: 17 Nov 2007
Posts: 3525
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Re: Combinations and Probability on real GMAT [#permalink]

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20 Mar 2009, 08:19
I saw 2 prob/comb questions in my real exam and one of two was Q49+ level
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Manager
Joined: 08 Mar 2009
Posts: 185
Re: Combinations and Probability on real GMAT [#permalink]

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20 Mar 2009, 08:31
I guess part of my question also involves when do you move on from a topic you have a hard time with....am I wrong to assume that in order to get a top score you need to master all areas...I assume even people who get mid-700s also struggle with certain concepts..
Current Student
Joined: 31 Aug 2007
Posts: 365
Re: Combinations and Probability on real GMAT [#permalink]

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22 Mar 2009, 14:44
i'd say don't worry about it too much...you really won't see more than at most, 3 questions on combinations/permutations. and there are multiple ways to solve the problems--it's not necessary to use the formulas and solve them the way the forum does.
Intern
Joined: 28 Feb 2009
Posts: 30
Re: Combinations and Probability on real GMAT [#permalink]

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24 Mar 2009, 12:56
As I worked through the OG, I could not help but notice that the combinations and permutations and probability questions appeared much later on and the density increased. My guess is that your time trying to learn these will be well spent.
Manager
Joined: 08 Mar 2009
Posts: 185
Re: Combinations and Probability on real GMAT [#permalink]

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24 Mar 2009, 15:56
I know..I need to get a grasp of the concepts and the most frequently formatted questions..I just fear getting to obsessed with mastering a topic.....
Director
Joined: 04 Oct 2008
Posts: 891
Location: United States (CA)
Concentration: Entrepreneurship, Strategy
Schools: Michigan (Ross) - Class of 2013
GMAT 1: 770 Q50 V44
GPA: 3.3
WE: Project Management (Aerospace and Defense)
Re: Combinations and Probability on real GMAT [#permalink]

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13 Apr 2009, 07:48
1
KUDOS
I scored Q47 and didn't have any comb/permutation or probability questions. Maybe I'm just special

If you're short on time, a basic knowledge of these subjects should be sufficient to limp through the 0-2 questions that you might see on your exam. Number properties will be far more important for reaching your target score.
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Director
Joined: 26 Mar 2008
Posts: 652
Schools: Duke 2012
Re: Combinations and Probability on real GMAT [#permalink]

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14 Apr 2009, 18:37
I got a 48 or 49 (how embarrassing, I already can't remember) and I don't recall having any stats questions. I had stats in college and did really well, but clearly nothing stuck because I gave up studying for these in my practice. I as a general rule don't memorize anything (I didn't study any formulas for GMAT), and without a formula in front of me, these made my head spin. So I decided to play the odds and if that had brought my score down, so be it.

They obviously didn't make a lasting impression, so either I didn't have one or it was really easy. If you can do the easy ones, I would recommend ditching the rest.
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Joined: 09 Mar 2007
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Schools: Erb Institute: Ross | SNRE
Re: Combinations and Probability on real GMAT [#permalink]

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15 Apr 2009, 17:54
if you've mastered everything else, then work on these guys. otherwise, don't waste too much time. i don't like permutations and combinations so i gave myself a time limit on these (and any other questions that i'm weaker in). if i felt like i was spending too much time, i moved on. i think i guessed on maybe 4-5 questions in quant. i can't really remember, but i do remember just picking answers and moving on so i didn't waste time.
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Re: Combinations and Probability on real GMAT   [#permalink] 15 Apr 2009, 17:54
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# Combinations and Probability on real GMAT

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