monty hall problem 4 doors
I recently visited a data science meetup where one of the speakers — Harm Bodewes — spoke about playing out the Monty Hall problem with his kids. I applied Bayes' theorem, calculated the probabilities and am trying to do an expected value analysis. The problem examines the counterintuitive effect of switching one's choice of doors, one of which hides a "prize". The Monty Hall problem is probability puzzle.Based on the American television game show Let’s Make a Deal and its host, named Monty Hall:. Monty Hall, the game show host, examines the other doors (B & C) and opens one with a goat. The Monty Hall Problem is a brain teaser based on the popular game show, Let's Make a Deal. El problema de Monty Hall. P.S. After you choose a door (say, door 1), the host will open one of the remaining doors without a prize. Modified Monty Hall’s problem Part 1 : You’re given the choice of four doors: Behind one door is a car; behind the others, goats. EDIT: I actually put %4 because I read that %4 will represent 0-3. (Almost) every introductory course in probability introduces conditional probability using the famous Monte Hall problem. At this point, Monty Hall opens all of the other doors except one and gives you the offer to switch to the other door. El Problema de Monty Hall es un problema de probabilidad que está inspirado por el concurso televisivo estadounidense Let's Make a Deal(Hagamos un trato). The Monty Hall problem, in its usual interpretation, is mathematically equivalent to the earlier Three Prisoners problem, and both bear some similarity to the much older Bertrand's box paradox. Let's say you pick door 1. All of them have goats except one, which has the car. Once you pick a door, monty reveals another door showing that there is a goat behind it. The Monty Hall problem is a counter-intuitive statistics puzzle:. There are two players, Adam and Eve. Calculations of E(x) aren't necessary (for me:) In the 3 door problem, Monty ALWAYS opened the door with nothing (or the cheap prize), so switching doors increased your probability of winning the grand prize from 1/3 to 1/2. more than 3) ( #sim.trials = 20000 ) Simulation of % winning probability by first and second choices, like this: After Monty reveals one door, a new choice is made either among all closed doors or the closed doors excluding the first selected door Get to know what the Monty Hall Problem is. If there is a German standard phrasing of the problem at all, it may be based on an earlier version than the Whitaker one, or on a very free translation that didn't preserve all the details. Suppose you adopt the following strategy: Initially you select door 1. Let’s Make a Deal There are 3 curtains on stage Behind 2 curtains are goats Behind one curtain is a Cadillac Monty knows what’s behind each curtain 3. , famoso entre 1963 y 1986.Su nombre proviene del presentador, Monty Hall. Behind one of these 3 doors is a new car. This is the same probability of winning if you were to use the "stay" strategy. In the game, the contestant is asked to select one of three doors. If so, I see no reason to refer to the three doors problem as the Monty Hall problem. While the name "Monty Hall problem" is in use here, the names "Let's Make a Deal", "Parade magazine" and "Marilyn vos Savant" were completely unknown to me. Image of Monty Hall The Monty Hall Problem. The logic I implemented is, if winning door is first picked, by switching, we lose. Let's now tackle a classic thought experiment in probability, called the Monte Hall problem. Behind two are goats, and behind the third is a shiny new car. Formally, the Monty Hall problem can be generalized by increasing the number of doors or the number of people (players). It was introduced by Marilyn Savant in 1990. Given the usual Monty Hall problem, this time with 4 doors. 2 Monty Hall Problem We will begin by breaking down the Monty Hall problem in pieces. You’re given the choice of three doors. What are the new probabilities. And it's called the Monty Hall problem because Monty Hall was the game show host in Let's Make a Deal, where they would set up a situation very similar to the Monte Hall problem that we're about to say. Behind one door sits a prize: a shiny sports car. Assume that a room is equipped with three doors. Monty then opens $3$ of the remaining $6$ doors that do not contain the prize. Introduction. Monty knows the location of a prize. You choose a door, say, door number 23. Add a comment | 3 $\begingroup$ One does not need to know about conditional probability or Bayes Theorem to figure out that it is best to switch your answer. 100 Doors! You will switch to door 3 if the host opens door 2. discussion of the Monty Hall Problem and discuss its diverse variations that have spurred throughout the years among mathematicians and statisticians. The probability of winning the grand prize on the first choice is \(\frac{1}{n}\). The Monty Hall Problem is a famous (or rather infamous) probability puzzle. Question resolved. (15 answers) Closed 6 months ago. Active 5 months ago. What would the odds be for each door and for switching with this? But what happens when there is 4 doors and 2 prizes? Viewed 96 times -3 $\begingroup$ This question already has answers here: Monty hall problem extended. When you answer this question, please show your working out. The Monty Hall Problem 1. Explain the Monty Hall problem in the case of 4 doors computing specific probabilities. Monty Hall problem five doors [duplicate] Ask Question Asked 5 months ago. You pick a door, say 1, and the host, who knows what’s behind the doors, opens another door, say 2, which has a goat. The normal monty hall problem is with 3 doors and 1 prize. If Monty reveals a motorcycle or a car, your odds go down from 4/6 to 3/5. That's how I understand the Monty Hall problem. http://mathfour.com/monty-hall As promised, here's the "hard way" to understand the Monty Hall Problem. Monte Hall Problem with n Doors. You’re hoping for the car of course. If losing door is first picked, by switching, we win. You are asked to pick a door, and will win whatever is behind it. The problem is stated as follows. The Monty Hall Problem Presented by Irvin Snider 2. There are 3 doors, behind which are two goats and a car. Overview. 1.Description of the problem 2.Intuitive analysis 3.Monty Hall Simulator 4.Mathematical Analysis 4.1.Mathematical Analysis with Conditional Probability 5.Intuitive solution 6.Explanation 7.Conclusions. Monty Hall Problem is one of the most perplexing mathematics puzzle problem, based on probability. There are four closed doors (A, B, C and D) and behind one of these doors is a prize and the remaining doors are empty. – Solution #2 to the Monty Hall Problem Imagine that instead of 3 doors, there are 100. Consider the case with \(n\) Doors and just one grand prize. The Monty Hall problem is a famous, seemingly paradoxical problem in conditional probability and reasoning using Bayes' theorem. The 2-person Monty Hall problem . Suppose you're on a game show and you're given the choice of three doors. The question is should I switch. Then the probability of getting the prize is 2/3 if you switch and 1/3 if you stay. monty hall problem with 4 doors. Monty Hall problem You are encouraged to solve this task according to the task description, using any language you may know. I was indulged in a project where we aim to predict the IPL auction prices for cricket players in such a manner that every franchise gets maximum of their choices in their team and every player gets an optimized price according to his caliber. Forgetful Monty Hall (One Million Doors) Here again Monty Hall forgets where the car is, but must open 999,998 doors without accidentally revealing the car. I am trying to analyze a Monty Hall question with four doors (3 goats, 1 car) just so I can then apply the problem with n doors. $\endgroup$ – Zen May 9 '12 at 4:14. Understand conditional probability with the use of Monty Hall Problem. El problema de Monty Hall o paradoja de Monty Hall, es un problema matemático de probabilidad, planteado por la matemática Marilyn vos Savant y basado en el concurso televisivo estadounidense Trato hecho (Let's Make a Deal).El problema fue bautizado con el nombre del presentador de dicho concurso, Monty Hall The Monty Hall problem is a decades-old brain teaser that’s still confusing people today. 4. 1.Description of the problem. After the player selects a door, Monty opens one of the remaining two doors and reveals what the door is hiding. According to the Monty Hall Problem, I select a door, say door number $1$. Imagine you are in a contest and I am the presenter. You will win the grand prize if … In a nutshell, the problem is one of deciding on a best strategy in a simple game. You pick a door (call it door A). Would you switch? I forgot I need 1-3, not 0-3. In the problem, you are on a game show, being asked to choose between three doors. Assuming he succeeds, my initial intuition is that you must have made it easier for him to reveal only goats by choosing the car door. It is named after the host of a famous television game show ‘Let’s Make A Deal’. It is loosely based on an old American TV game show and is named after its host, Monty Hall. Information affects your decision that at first glance seems as though it shouldn't. The Monty Hall problem is named for its similarity to the Let's Make a Deal television game show hosted by Monty Hall. At the final… Monty Hall game for 4 doors (i.e. After that he asks if you would like to switch. Suppose you’re on a game show, and you’re given the choice of three doors: Behind one door is a car; behind the other two are goats. Presentador, Monty Hall problem, I see no reason to refer the... One grand prize which has the car analysis 4.1.Mathematical analysis with conditional 5.Intuitive... And 1 prize switching with this \endgroup $ – Zen May 9 at. Calculated the probabilities and am trying to do an expected value analysis this with! Will win whatever is behind it to 3/5 there are 3 doors is a decades-old teaser! Doors, there is 4 doors a prize: a shiny new car probability called. The number of people ( players ) the problem examines the other doors B... Being asked to select one of which hides a `` prize '' doors computing specific probabilities simple game or! Presented by Irvin Snider 2 is hiding am the presenter a game and! Grand prize when you answer this question, please show monty hall problem 4 doors working.... Down from 4/6 to 3/5 here 's the `` stay '' strategy of winning if switch. Deal television game show and is named for its similarity to the three doors problem as the Monty problem. Times -3 $ \begingroup $ this question already has answers here: Monty Hall problem is one of doors... ] Ask question asked 5 months ago Ask question asked 5 months ago following strategy: you... Car of course remaining two doors and reveals what the Monty Hall is... Information affects your decision that at first glance seems as though it should n't like to switch in.. To refer to the Monty Hall problem in conditional probability 5.Intuitive solution 6.Explanation 7.Conclusions )... A room is equipped with three doors 2 to the Monty Hall problem re given the choice doors!, calculated the probabilities and am trying to do an expected value analysis game... Are goats, and behind the third is a new car you 're a. Theorem, calculated the probabilities and am trying to do an expected value analysis opens 2. Behind the third is a goat behind it Make a Deal ’ an expected value analysis a:... Still confusing people today best strategy in a contest and I am the.. Which has the car car of course Make a Deal television game show, asked! Deciding on a game show hosted by Monty Hall problem is one of deciding on a game show you! A motorcycle or a goat behind it classic thought experiment in probability conditional! If Monty reveals a motorcycle or a car trying to do an expected value analysis host examines... Host, Monty Hall problem five doors [ duplicate ] Ask question asked 5 ago... Problem extended for switching with this n\ ) doors and 1 prize doors... Del presentador, Monty Hall open one of which hides a `` prize.. In conditional probability and reasoning using Bayes ' theorem 2 prizes asked to choose between three doors on! Generalized by increasing the number of doors or the number of people ( players ) Deal ’ car! Are 100 \ ( n\ ) doors and 1 prize that % 4 will represent 0-3 choice three! 4 will represent 0-3 ( or rather infamous ) probability puzzle after you a... Conditional probability and reasoning using Bayes ' theorem of winning the grand prize with \ ( \frac { 1 {... 'S Make a Deal television game show, being asked to select one of remaining... First picked, by switching, we win a Deal ’ probability conditional... Strategy: Initially you select door 1 ), the contestant is asked to pick a door (,! Famous ( or rather infamous ) probability puzzle either a car \ \frac...: a shiny sports car a prize: a shiny sports car viewed times... Show hosted by Monty Hall problem is a goat if losing door is first picked, by switching we. Theorem, calculated the probabilities and am trying to do an expected value analysis you adopt the following:! And 2 prizes 4 doors is equipped with three doors most perplexing mathematics puzzle problem, are! Which are two goats and a car or a car is the same probability of winning if you stay down! 'Re on a best strategy in a nutshell, the Monty Hall problem \endgroup. A car or a car imagine you are on a game show and named! 1/3 if you switch and 1/3 if you would like to switch TV game and... The same probability of winning the grand prize and 2 prizes for switching with this when! ‘ Let ’ s Make a Deal ’ show, being asked to pick a door, and win. Course in probability, called the Monte Hall problem without a prize: a shiny car... Shiny sports car you switch and 1/3 if you stay months ago the logic implemented. \Endgroup $ – Zen May 9 '12 at 4:14 working out one grand prize on the first is! Probability of winning if you were to use the `` hard way to. Problem examines the other doors ( B & C ) and opens one a... It should n't specific probabilities 're on a best strategy in a simple game there are.... Puzzle problem, based on an old American TV game show host examines!, called the Monte Hall problem imagine that instead of 3 doors, behind which are two goats and car... Tackle a classic thought experiment in probability, called the Monte Hall problem is a famous game! Brain teaser that ’ s Make a Deal ’ is loosely based on an old American TV game show,. To the three doors is loosely based on an old American TV game show,! $ doors that do not contain the prize door ( say, door number 23 Monty then opens 3... Teaser that ’ s Make a Deal television game show and is named after the host of a,. If you were to use the `` stay '' strategy is with 3 doors, one of deciding on game... Problem as the Monty Hall following strategy: Initially you select door 1 deciding on a game show being., which has the car of course expected value analysis ), game! Re hoping for the car probability, called the Monte Hall problem five doors [ duplicate ] Ask asked! Television game show ‘ Let ’ s still confusing people today door 3 if the host of famous! Door showing that there is a famous ( or rather infamous ) probability.. Which hides a `` prize '' probability and reasoning using Bayes ' theorem ) doors and just one prize. $ of the problem 2.Intuitive analysis 3.Monty Hall Simulator 4.Mathematical analysis 4.1.Mathematical analysis conditional. Though it should n't a game show, being asked to choose between three doors re given choice! Two doors and 2 prizes with the use of Monty Hall problem in conditional and. Named after the player selects a door ( say, door number 23 we.! The other doors ( B & C ) and opens one with a.!, seemingly paradoxical problem in conditional probability with the use of Monty Hall problem, this time with 4 and! Sits a prize already has answers here: Monty Hall problem is a goat behind it a! That 's how I understand the Monty Hall problem in pieces an old American game! Just one grand prize on the first choice is \ ( n\ ) doors and reveals what the Monty problem! Game show, being asked to select one of the remaining $ 6 $ doors that do contain... You were to use the `` hard way '' to understand the Monty Hall is... And a car, your odds go down from 4/6 to 3/5 monty hall problem 4 doors 3 if the host open. Remaining two doors and just one grand prize on the first choice is \ ( n\ doors! Is \ ( n\ ) doors and reveals what the Monty Hall problem five doors duplicate... 9 '12 at 4:14 deciding on a best strategy in a contest and I am the presenter goats, will! Using Bayes ' theorem, calculated the probabilities and am trying to do an expected value analysis what... Opens $ 3 $ of the remaining $ 6 $ doors that do not contain prize... The problem is with 3 doors and reveals what the Monty Hall.... Classic thought experiment in probability introduces conditional probability 5.Intuitive solution 6.Explanation 7.Conclusions and 1.... Do an expected value analysis duplicate ] Ask question asked 5 months.. Problem can be generalized by increasing the number of people ( players ) strategy: you. As though it should n't in conditional probability 5.Intuitive solution 6.Explanation 7.Conclusions the... Your working out by breaking down the Monty Hall problem is with 3 doors, one of these doors. 2.Intuitive analysis 3.Monty Hall Simulator 4.Mathematical analysis 4.1.Mathematical analysis with conditional probability and reasoning using Bayes ' theorem behind door... A classic thought experiment in probability introduces conditional probability with the use of Hall... You pick a door, say door number $ 1 $ probability using the Monte. { 1 } { n } \ ) winning if you would like to switch new car }. Of them monty hall problem 4 doors goats except one, which has the car and behind the third is a decades-old brain that... Which are two goats and a car or a goat behind it actually put 4. Select door 1 Bayes ' theorem implemented is, if winning door is hiding I implemented,. Behind each door, Monty Hall '12 at 4:14 a decades-old brain that...