41. Deal Or No Deal? [Archive] - HFBoards http//en.wikipedia.org/wiki/monty_hall_problem I read the whole article, and see the evidence they give with the two scenarios in which is works out by http://hfboards.com/archive/index.php/t-470074.html

HFBoards Non-Sports The Lounge PDA ... Deal or No Deal? 01-25-2008, 01:36 PM Just when I thought I couldn't see any more greed possible in this world, I tune into this show. Does anyone else have a problem with humanity when you see people turn down hundreds of thousands of dollars at their 1 in 26 chance of winning one mil? Money that some of these people wouldn't seem to earn in five years of work. Sick stuff. Nighthock 01-25-2008, 01:39 PM Just when I thought I couldn't see any more greed possible in this world, I tune into this show. Does anyone else have a problem with humanity when you see people turn down hundreds of thousands of dollars at their 1 in 26 chance of winning one mil? Money that some of these people wouldn't seem to earn in five years of work. Sick stuff. I personally only tune in to watch people lose ... it's fantastic. :D illogic 01-25-2008, 01:42 PM Just when I thought I couldn't see any more greed possible in this world, I tune into this show. Does anyone else have a problem with humanity when you see people turn down hundreds of thousands of dollars at their 1 in 26 chance of winning one mil? Money that some of these people wouldn't seem to earn in five years of work. Sick stuff.

42. The CTK Exchange Forums The page http//en.wikipedia.org/wiki/monty_hall_problem is great; but if you look at the various behavioral possibilities discussed there, you could not http://www.cut-the-knot.org/htdocs/dcforum/DCForumID4/734.shtml

var MyPageLoc = document.location; var MyPageTitle = document.title; CTK Exchange Front Page Movie shortcuts Personal info ... Recommend this site CTK Exchange Subject: "Monty Hall" Previous Topic Next Topic Printer-friendly copy Email this topic to a friend Conferences The CTK Exchange This and that Topic #734 Reading Topic #734 Hugh O'Byrne guest Oct-12-06, 03:32 PM (EST) "Monty Hall" Suppose you're on a game show, and you're given the choice of three doors. Behind one door is a car, behind the others, goats. You pick a door, say number 1, and the host, who knows what's behind the doors, opens another door, say number 3, which has a goat. He says to you, "Do you want to pick door number 2?" Is it to your advantage to switch your choice of doors? The way the question is stated, there is no constraint on Monty's behaviour. In fact, in the real game show, Monty did not *have* to open a goat door at all. It made for more exciting TV, but he didn't have to do it every time. So, Monty could tweak the odds. If he dislikes a contestant, and she picked a goat, Monty could end the game there and say "You picked a goat, you lose". If he dislikes her, and she picked the car, he could give her another chance to lose. Conversely, if he likes the contestant, and the she chooses the car, and there are no constraints on Monty, he can give it to her. If she chooses a goat, he can give her another chance to win.

43. WCReplays.com Community Forums - Puzzle - Can You Do It? There is a clear answer that can be explained mathematically! switch please http//en.wikipedia.org/wiki/monty_hall_problem http://www.wcreplays.com/forums/archive/index.php/t-88794.html

WCReplays.com Community Forums General Forums Member Chat PDA View Full Version : puzzle - can you do it? TheBlackElf 11-30-2007, 11:49 AM ok, short story: THIS (http://puzzle.arpatubes.net/) It took me some time to figure it out. Hmm. Luipaard 11-30-2007, 12:00 PM Hmmm, can't figure it out, not really tring that hard either :p: I tried: There is no spoon. Number of times I have seen this incorrect answer: 3 TheBlackElf 11-30-2007, 12:00 PM haha lol Baxter 11-30-2007, 12:02 PM wow way too many sevens :) I for 1 find the answer is not that hard to find, I would't say effort though. It took me like 9 minutes. cool puzzle, we should do more here, it improves critical thinking. I've seen like 90 different websites with puzzle forums and imho it's fun to try! Schpwuette 11-30-2007, 12:03 PM Wierd. I got the wrong answer, and then doing (what seemed like) the same thing, I got a different one, and it was right O_o BlackShadow 11-30-2007, 12:08 PM took 3 tries... -_- i fail didn't read the question properly until the 3rd try So.nic

44. LUGRadio Forums • View Topic - Was Jono Right After All? Sorta OT but an interesting probability problem that I had to have someone explain to me the other day http//en.wikipedia.org/wiki/monty_hall_problem http://forums.lugradio.org/viewtopic.php?f=1&t=3518&p=35653

45. Wiki - The Monty Hall Problem - Cable Forum http//en.wikipedia.org/wiki/monty_hall_problem Okay people debate - i say they are talking buttkiss because after the host opens the door and shows that http://www.cableforum.co.uk/board/25/32350-wiki-the-monty-hall-problem.html

Home News Forum Articles Welcome back Join CF You are here: Home Forum You are currently viewing our boards as a guest which gives you limited access to view most of the discussions, articles and other free features. By joining our Virgin Media community you will have full access to all discussions, be able to view and post threads, communicate privately with other members (PM), respond to polls, upload your own images/photos, and access many other special features. Registration is fast, simple and absolutely free so please join our community today. Welcome to Cable Forum Cable Forum Internet Discussion Wiki - The Monty Hall problem User Name Remember Me? Password Register FAQ Members List Calendar ... Mark Forums Read Wiki - The Monty Hall problem Thread Tools TheBlueRaja CableForum - Talk to me! Join Date: Dec 2003 Location: Baw deep in a munter Age: 32 Services: Initiations, rep rigging and orgies! Posts: 5,637 Wiki - The Monty Hall problem http://en.wikipedia.org/wiki/Monty_Hall_problem Okay people - debate - i say they are talking buttkiss because after the host opens the door and shows that there is a goat behind it there is a 50/50 chance of the player winning at this point - so therefore switching wont increase the odds of winning. Right?

46. Deal Or No Deal (http//en.wikipedia.org/wiki/monty_hall_problem) type consideration that needs to be taken into effect as cases are eliminated? http://nixforums.org/about111010.html

FAQ Search Memberlist Usergroups Register Profile Preferences Log in to check your private messages Log in nixdoc.net man pages Linux HOWTOs FreeBSD Tips ... deal or no deal Page of [8 Posts] View previous topic View next topic Author Message rbt *nix forums Guru Wannabe Joined: 20 Feb 2005 Posts: 194 Posted: Thu Dec 22, 2005 2:29 pm Post subject: deal or no deal The house almost always wins or are my assumptions wrong... import random amounts = [.01, 1, 5, 10, 25, 50, 75, 100, 200, 300, 400, 500, 750, results = [] count = count = count + 1 pick = random.choice(amounts) results.append("NBC won... Your briefcase contains $%s" %pick) else: results.append("You won... Your briefcase contains $%s" %pick) print "Here are 10 random picks: " for result in results: print result Back to top Bengt Richter *nix forums Guru Joined: 25 Feb 2005 Posts: 711 Posted: Thu Dec 22, 2005 3:42 pm Post subject: Re: deal or no deal Quote: The house almost always wins or are my assumptions wrong... import random amounts = [.01, 1, 5, 10, 25, 50, 75, 100, 200, 300, 400, 500, 750

47. WoW Forums - Post Search Posted By Aethryl on; Q uote /me cuts the argument short http//en.wikipedia.org/wiki/monty_hall_problem Sorry P Curses, foiled again. http://forums.worldofwarcraft.com/search.html;jsessionid=D8D24C94D31728301A9BAF9

48. Logic Puzzle - WiFi-BattleArena http//en.wikipedia.org/wiki/monty_hall_problem. This assumes that the host will always open a door with a goat, which is never actually stated in the http://wifibattlearena.net/forums/index.php?showtopic=218&pid=2007&mode=threaded

49. Monty Hall Problem [Archive] - Jordan Rudess' Community Forums That is why your odds are improved by switching doors in that game. I think this page explains it elegantly http//en.wikipedia.org/wiki/monty_hall_problem http://www.jordanrudess.com/forum/archive/index.php/t-1183.html

Jordan Rudess' Community Forums Online Keyboard Community General Chat PDA View Full Version : Monty Hall Problem Phred 07-30-2004, 08:59 AM Suppose you're on a game show, and you're given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what's behind the other doors, opens another door, say No. 3, which has a goat. He then says to you, 'Do you want to pick door No. 2?' Is it to your advantage to take the switch? Does it matter? This is a problem that has sparked a great many arguments, and controversy. Let's see who can get it. Phred 07-30-2004, 10:24 AM Here is the answer for those who want it... ...........DON'T Read if you haven't voted yet........ The key is that the host knows what is behind each door. What if I asked you this: Pick a door - you pick A. Now would you like to stay with door A, or pick door B AND C - if it is behind either of them you win. What would you do? Most likely you would see it to your advantage to switch. If you stay with your original pick you have a 1/3 chance. If you switch to both doors, you have a 2/3 chance right? It doesn't change if I show you a door that definately doesn't have a car behind it. When you are shown the door you will never be shown your door or the winning door. Only the other bogus door. Which means the odds of the Car being behind the door you didn't choose is 2/3 and 1/3 of being behind your door.

50. MatlabCentral - Probability Question Regarding Deal Or No Deal similar to the Let s Make a Deal problem made famous by Marilyn vos Savant in her Parade Magazine column. http//en.wikipedia.org/wiki/monty_hall_problem http://www.mathworks.com/matlabcentral/newsreader/view_thread/164881

An open exchange for the MATLAB and Simulink user community Search: MATLAB Central File Exchange MATLAB Newsgroup Link Exchange Blogs Programming Contest MathWorks.com All of MathWorks.com Login File Exchange MATLAB Newsgroup Link Exchange ... MATLAB Newsgroup > Probability question regarding Deal or no Deal Add thread to My Watch List What is a Watch List? Thread Subject: Probability question regarding Deal or no Deal Subject: Probability question regarding Deal or no Deal From: waggonra Date: 29 Feb, 2008 19:17:40 Message: 1 of 12 Reply to this message Add author to My Watch List View original format Flag as spam Am I the only one who doesn't think that the probability of having the $1,000,000 case when there are only two cases left, the one first chosen and the only one not chosen, is not .5? My argument is that there is a slightly better chance of it being in the case not chosen yet. My reasoning is this; the odds of leaving the 1,000,000 case in play and then opening 24 non-million dollar cases should be slightly better than 1/26. Can someone please verify that I am correct or explain why I am wrong. Thanks. Subject: Re: Probability question regarding Deal or no Deal From: waggonra Date: 29 Feb, 2008 19:35:22

51. Of Goats And Porsches: A Monty Hall Paradox Simulator « Andrew Fraser See http//en.wikipedia.org/wiki/monty_hall_problem for background info Usage monty_hall.sh no_iterations twitchy stubborn e.g. monty_hall.sh http://andrewfraser.wordpress.com/2007/01/17/of-goats-and-porsches-a-monty-hall-

var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); Andrew Fraser Oracle DBA (and a little SQL Server) Identify what auditing is on SQL Server 2005 Of Goats and Porsches: A Monty Hall Paradox Simulator The Monty Hall Paradox So I wrote the below simulator to find out. It uses the Monte Carlo Technique , which is a nice way of solving math problems numerically. The results from my run are pretty conclusive: Twitchy winners : 653 Twitchy losers : 347 Stubborn winners : 318 Stubborn losers : 682 Code listing below: For the actual run I did, with results pasted above, I ran: This entry was posted on Wednesday 17 January 2007 at 5:23 pm and is filed under general musings . You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response , or trackback from your own site. Simon Kelsey Says: Thursday 18 January 2007 at 4:06 pm Mark Says: Monday 29 January 2007 at 4:51 am Uri Kalish Says: Tuesday 1 May 2007 at 4:09 am http://urikalish.blogspot.com/2007/02/vertigo-and-lion-intuition-can-be.html

52. Maths Question [Archive] - Page 3 - Aussie Phorums http//en.wikipedia.org/wiki/monty_hall_problem Sorry, but that page isn t very good. There is no explanation for why the http://phorums.com.au/archive/index.php/t-240062-p-3.html

Aussie Phorums USENET / Newsgroup gateway aus.* aus.tv View Full Version : Maths question Pages : Ext User(Phil Carmody) 26-05-2007, 12:33 AM > ["Followup-To:" header set to aus.tv.] Obeyed. posting from sci.math. > > "Mark" <buggy@earwax.com> wrote in message > >> you,"Do you want to pick door No. 2?" Is it to your advantage to Wrong. Google for 'monty hall'. Learn. Don't post innumerate crap again until you do. Phil "Home taping is killing big business profits. We left this side blank so you can help." Dead Kennedys, written upon the B-side of tapes of /In God We Trust, Inc./. Ext User(Glen Wheeler) 26-05-2007, 12:33 AM "jherth" <jherth@noaddress.com> wrote in message news:135dfhqeb2ndhcf@news.supernews.com... >> "Richard Kelly" <blamesociety@yahoo.com> wrote in message Huh? It's written in the question that the host always opens a dud door. Glen Ext User(jmorriss@idirect.com) 26-05-2007, 12:33 AM On May 25, 6:46 am, "jherth" <jhe...@noaddress.com> wrote:

53. Can Someone Solve This Math Riddle For Me - Page 3 Hence the map name. There are 3 paths you can choose to expo to. http//en.wikipedia.org/wiki/monty_hall_problem. DRank SC Player, S-Rank Dronebabo Lover http://www.teamliquid.net/forum/information/56846/3/index.php

Active : 366 Logged in : 109 News Forum VODs Liquibet ... Time : 16:30 KST Op TL-West (active: of Google TL.net More options TeamLiquid StarLeague Determination ... Closed Threads New to Team Liquid? Register here! can someone solve this math riddle for me - Page 3 Forum index General Forum All Monoxide Canada. July 23 2007 08:43. Posts 536 it should be 27-2 because the 2 dollars is already accounted for in the 27 dollars that they paid.... Who Run It? Cascade Sweden. July 23 2007 08:51. Posts 744 You should switch. It is 33% that you pick the right one at first, so 67% to get the prize if you switch. You are falling in the trap of this riddle. One is tempted to say "two boxes, we do not know which one contains the prize, so 50%". It is however not two boxes of which we know nothing: As you said, the host knows where the prize is, and as he always takes away the empty one, he is "moving" the probability to find the prize in both boxes into just one of the boxes. The 50% argument is only valid if the situation is completely symmetric, which it is not: the host has rejected to open the other box, thereby increasing the probability for it to contain the prize. EDIT: also note that in two of the three possible situations you list, you will win if you switch.

54. James Tauber : Monty Hall Python I find the Wikpedia (http//en.wikipedia.org/wiki/monty_hall_problem) explanation most intuitive, though it s only subtly different than above. http://jtauber.com/blog/2007/06/19/monty_hall_python/

James Tauber journeyman of some Home Page Contact Information Colophon Blog ... Jun Mo Tu We Th Fr Sa Su Affiliations mValent University of Essex Open Source Software ... Demokritos Website Projects Cats or Dogs habitualist Just One Suggestion Potter Predictions ... Tintin Movie Info Other Projects Alibi Phone Network In the Light of Day MorphGNT Nelson James ... Programming Competition Interests Python Linguistics Music Theory Music Composition ... blog Monty Hall Python The Monty Hall Problem is one of my favourite examples of a counterintuitive solution in mathematics. It works as follows: A car (or some other suitable prize) is placed behind one of three closed doors. You, as contestant, pick one of the doors. The host of the show, Monty Hall, opens one of the other two doors (making sure to pick one without the car) You are then given the option to stay with your original pick or to switch to the other unopened door. Now, the counterintuitive solution is that you double your chances of winning by switching. This is counterintuitive because Monty opening one door hasn't told you anything new about which of the two remaining closed door is likely to have the car behind it. Here's how I think about it mathematically: when you pick your door, there is a 1/3 chance it's behind the door you picked and a 2/3 chance it's behind one of the other two doors. When Monty opens one of the doors, he hasn't changed that fact: there's still a 2/3 chance it's behind one of the two doors you didn't pick. It's just now he's narrowed down which of the two doors it could be behind. So there's a 2/3 chance it's behind the door you didn't pick that's still closed as opposed to a 1/3 chance it's behind the door you original picked. So you double your chances by switching.

55. Brain Teasers Forum [Powered By Invision Power Board] I m basing this on the Bayesean logic behind the popular Monty Hall Problem urlcdca1http//en.wikipedia.org/wiki/monty_hall_problem/url http://brainden.com/forum/index.php?act=Print&client=printer&f=7&t=514

56. Door Number 3, Monty! | Ask Metafilter After a bit of time educating ourselves on the internet as to why you should always switch doors (http//en.wikipedia.org/wiki/monty_hall_problem) we need http://ask.metafilter.com/34849/Door-number-3-Monty

skip to main content MetaFilter AskMeFi Projects ... New User Tags: Montehall mathemagical probabilities math ... statistics var federated_media_section = ''; Advertise here: Contact FM Door number 3, Monty! March 21, 2006 9:52 PM Subscribe Besides the Monty Hall paradox, what are some other counterintuitive math problems that require a bit of a mind warp? My partner is doing a stats class in which the Monty Hall paradox was brought up. After a bit of time educating ourselves on the internet as to why you should always switch doors (http://en.wikipedia.org/wiki/Monty_Hall_problem) we need more! What are some other strange math/probability questions that go against all gut instinct? posted by arcticwoman to education (89 comments total) 5 users marked this as a favorite Well, there's the birthday paradox for a start. posted by flabdablet at 10:00 PM on March 21 e^(pi * i) + 1 = The most amazingly improbably nonsensical thing I have ever come across that is absolutely true. Makes the Monty Hall paradox look obvious. Not only is it true, but the proof is almost as beautiful as the equation itself. Why should the ratio of the circumpherence of a circle to its diameter have anything to do with the constant for continuously calculated rate of return have anything to do with the square root of -1, a number that, contrary to the other two

57. Quantum Interaction 2007 The many probabilistic puzzles, like the Monty Hall Problem (http//en.wikipedia. org/wiki/monty_hall_problem) or the probability of having a disease given a http://ir.dcs.gla.ac.uk/qi2007/

::programme Location (26th-28th): History Building, 200-305 DAY 1 (26 March) Behavior of Multi-Agent Protocols using Quantum Entanglement K.Y. Chen, T. Hogg, B.A. Huberman (HP Labs, USA) High Level Quantum Structures in Linguistics and Multi Agent Systems M. Sadrzadeh (University of Southampton, U.K.) Markov Entanglement Networks J. La Mura and L. Swiatczak (Leipzig Graduate School of Management, Germany) Morning Coffee (10:30am-11am) Session: QM and Logic (11:00am - 12:30pm) INVITED: A presentation of Quantum Logic based on an "and then" connective D. Lehmann (The Hebrew University, Israel) Automated Quantum Reasoning: Non Logic - Semi-Logic - Hyper-Logic B. Coecke (Oxford University, U.K.) Lunch (12:30pm-2pm) Quantum Computing of Analogical Modeling of Language R. Skousen (Brigham Young University, USA) How Intelligence Evolved? P. Marcer and P. Rowlands (University of Liverpool, U.K.) Combined Symbolic and Distributional Models of Meaning S. Clark and S. Pulman (Oxford University, U.K.) Afternoon Coffee (3:30pm-4:00pm) Interconnections of Quantum, Machine and Human Learning

58. Fiona-h: The Monty Hall Problem In it s more complex form, the solution is discussed here http//en.wikipedia.org/wiki/monty_hall_problem. 1114 AM fionah said. http://fiona-h.blogspot.com/2007/06/monty-hall-problem.html

skip to main skip to sidebar fiona-h Anbiathhlo mtacnaeake aorkdtmnsx natsptakop wbeuohnsul aanpiesata lrdanmanti ktegtaydrn shrusnswyi iepnittatt. The Monty Hall Problem This is a very famous puzzle; you may have come across it before. I absolutely love it. I love it because it is counter- intuitive (clue) and controversial to the point of emotional debate** (clue), and yet the problem is easy to describe and the solution is reasonably simple to explain. Don't get me wrong: complex math does some serious work behind the scenes (so they tell me; I'll take their word for it), but you don't need to be a mathematician to understand the solution...at least on a superficial level. The Monty Hall Problem gets its name from the host of an old TV game show called Let's Make a Deal . In the show, Monty offers a contestant a choice among three closed doors. Behind one is a new car; behind each of the other two is... I forget. Something less desirable than a new car. Maybe a goat. Yeah, I think that's it: each of the other two doors conceals a goat. (I know I could Google this but I am doing my best to write it down from memory.)

59. 3 Doors Probability Question / Puzzler Text - Physics Forums Library car being behind the unopened door is higher than being behind the original choice. you can try this http//en.wikipedia.org/wiki/monty_hall_problem http://www.physicsforums.com/archive/index.php/t-143903.html

Physics Help and Math Help - Physics Forums Mathematics Set Theory, Logic, Probability, Statistics PDA View Full Version : 3 doors probability question / puzzler my brother in law posed the following to me : A contestant on a game show is presented 3 doors, one of which has a car behind it and two do not. The contestant is asked to pick one. After choosing a door, the host then opens one of the two doors not picked by the contestant. The door opened does NOT have a car behind it. The contestant is now given the option of keeping his original door choice, or trading for the other remaining unopened door. Now, here is the question : Is there a higher probability that the car will be behind the remaining unopened door, behind his original door choice, or neither ? ( we have differing opinions ) Can anyone answer this ? Please provide a clear scientific explanation, as we got into a rather heated debate over this. If either door does have a better probability, can it be quantified ? thanks in advance Tom the car is behind the remaining unopened door if the original choice was wrong. and the probability of the original choics being wrong is 2/3. so the probability of the car being behind the unopened door is higher than being behind the original choice.

60. Talk:Monty Hall Problem - Uncyclopedia, The Content-free Encyclopedia 71.205.100.59 2013, 21 July 2006 (UTC). Retrieved from http//uncyclopedia. org/wiki/Talkmonty_hall_problem . Views. Article; Discussion; Edit; + http://uncyclopedia.org/wiki/Talk:Monty_Hall_problem

Talk:Monty Hall problem From Uncyclopedia, the content-free encyclopedia. Jump to: navigation search I wrote this while logged out, though I know that's entirely unverifiable... 22:20, 3 Jul 2005 (UTC) Sure it's verifiable. Just log out again and say that you wrote it. 20:13, 21 July 2006 (UTC) Retrieved from " http://uncyclopedia.org/wiki/Talk:Monty_Hall_problem Views Article Discussion Edit History Personal tools Log in / create account Navigation Main Page UnNews Featured content Babel ... Things to do Community Community portal Village Dump Chatroom Pee Review ... Votes for Pictures Search Toolbox What links here Related changes Upload image/file Special pages ... Permanent link projects This page was last modified 20:13, 21 July 2006. Content is available under a Creative Commons License About Uncyclopedia Wikia

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