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Bunuel
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Combinations + Poker Probability. By GMAT Pill. 15 Nov 2012, 10:29
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Combinations + Poker Probability (pairs, pocket aces)

a Video Lecture by GMAT Pill. A part of the 1,000,000 posts celebration

Combinatorics (nCr) - When does order matter? Poker Probability (what is your chance to get a pair of aces?)

Download a pre-work file with sample questions. Come prepared to the session and Q&A

The PPT deck of the lecture and sample qeustions are available here.

Description to the lecture:

00:00 - Intro

01:00 - Warmup

02:12 - Part 1 Overview: Combinations & Permutations vs Variations

08:35 - Part 1 Details: Picking Teams, Dice, Pocket Pair, Dating

17:21 - Part 2: Apply to GMAT - Word Problem #1

22:13 - Part 2: Apply to GMAT - Word Problem #2

31:34 - Part 2: Apply to GMAT - Word Problem #3

38:04 - Part 3: Poker Probability - Pocket Pair vs Pocket Aces

43:40 - Part 3: Poker Probability - Given Pocket Aces, 3-of-a-Kind?

46:13 - Part 3: Poker Probability - 1-Pair by 5th Flop

49:59 - Part 3: Poker Probability - Full House/Flush

1:00:00 - Conclusion

[youtube]https://www.youtube.com/watch?v=_hJwizANDQE[/youtube]

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BN1989
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Combinations + Poker Probability. By GMAT Pill. 15 Nov 2012, 15:05
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Is there a way for people who don't have a facebook account to access the video?
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Combinations + Poker Probability. By GMAT Pill. 15 Nov 2012, 15:09
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BN1989
Is there a way for people who don't have a facebook account to access the video?
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On the forum the video will be public tomorrow.
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Combinations + Poker Probability. By GMAT Pill. 16 Nov 2012, 06:50
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BN1989
Is there a way for people who don't have a facebook account to access the video?
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Hi BN1989,

Yes, we've posted an HD version of the video here:

https://www.gmatpill.com/gmat-practice-t ... ons-lesson

You can post your questions here as well.

Enjoy!
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Combinations + Poker Probability. By GMAT Pill. 16 Nov 2012, 08:54
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GMAT Pill video is now available in the first post: combinations-poker-probability-by-gmat-pill-142490.html#p1144000
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Combinations + Poker Probability. By GMAT Pill. 19 Nov 2012, 07:43
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Best questions & answers from comments



Dimiter Kraev
Is it fair to assume that most probability questions show up when 700+?
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The GMAT Pill Study Method
@Dimiter - Probability/Combinatorics is most common at the 700 level, but can also appear in the 600 area. More basic probability questions will be more prevalent at the 600 level while word problems involving choosing teams of committees will be more prevalent at the 700 level..

For those at the 500 to low 600 level, you likely won't see these types of questions. However, if you are shooting for over 700 - you're more likely to see these questions - particularly in word problem format.
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Ace Richards
What about geometry? at what level do these questions show up and how many can e expect?
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The GMAT Pill Study Method
Most geometry questions won't involve combinatorics. However, there are a few in the Official Guide that actually involve both coordinate geometry and combinatorics. So it is possible to see a question that combines both elements.

Of course, you'll only see these if you are consistently getting other quant questions correct and the system continually gives you more and more difficult questions - adding elements of combinatorics - possibly mixing them with other subjects like geometry.

Still the basics in the frameworks of variations vs combinations vs permutations at the beginning of the video are fair game for upper 600 level questions.
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For more check: https://www.facebook.com/photo.php?fbid= ... =1&theater
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Combinations + Poker Probability. By GMAT Pill. 18 Jul 2013, 00:11
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Bumped for review.

From GMAT Club's 10 Years & 1,000,000 Posts Milestone Celebration: 15 GMAT and MBA lectures jointly designed with our partners
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Combinations + Poker Probability. By GMAT Pill. 10 Apr 2021, 21:51
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In the Poker Problem, "Given Pocket Aces, what is P(3 of a kind)?", why do we have to first choose for a value and then pick a suit? Why can't we simply pick 2 cards out of the remaining 48(after removing the other ace)? [2C1*48C2]
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