Posted on 27 October 2015 - 10:23 PM
Ok so you have 3 windows, 2 with a apple, 1 with a ferrari. You open 1 that you think is right. then the judge shows you a window which has an apple. Knkw you know which 1 of the 2 windows have an apple behind. The judge asks "Do you want to change your answer" What are the odds in fraction of you getting the Ferrari if you switch or if you don't switch.95% will get this wrong
Posted on 27 October 2015 - 10:35 PM
Either 1/2 1/3 1/4 1/5 1/6 1/7 1/8 1/9 1/10 1/11 1/12 1/13 1/14 1/15 1/16 1/17 1/18Not too sure though
Posted on 27 October 2015 - 10:41 PM
Silverdonuts wrote
Not too sure though
Pick one
Posted on 27 October 2015 - 10:52 PM
SuperSubh3561 wrote
Silverdonuts wrote...
Pick one
is it one of them?
Posted on 27 October 2015 - 11:11 PM
1/2Posted on 28 October 2015 - 12:11 AM
Ye 1/2 I guess…Posted on 28 October 2015 - 12:15 AM
5/9This is what I was thinking…
Posted on 28 October 2015 - 12:20 AM
If you switch you get a 2/3 chance to win.If you don't you get a 1/3 chance to win.
Explanation for this -
When you first pick, you have a 1/3 chance of getting a car. Assuming the choice that was removed wasn't the car (as it was in the real game show), odds are that the one choice remaining was a car.
Basically, you start with a 33% chance of winning the car. You pick, odds are you didn't get the car. That leaves 2 unchosen 'windows', one of which is probably the car, and one of which is 100% of the time an 'apple'. Since Monty Hall never removes the car, he had to have removed an apple. Since you probably chose an apple (remember, 1/3 chance to get the car), you have a greater chance of winning if you switch your answer to what is probably the car (now a 2/3 chance).
I didn't get this right on my first try - I thought it was arbitrary on whether or not your switched…
Posted on 28 October 2015 - 01:33 AM
Answer above seems correct to meIf I choose window x, there is a 1/3 chance that the Ferrari is behind it.
If I don't choose window x, there is a 2/3 chance that the door isn't behind it.
Revealing a window with an apple behind it —
If I choose window x, there is a 1/3 chance that the Ferrari is behind it.
Because the Ferrari is behind one of the three remaining windows (reveal shows it is not behind window y), I get a 2/3 chance of winning by switching
Posted on 28 October 2015 - 06:33 AM
2/3im part of the 5% woo
Posted on 28 October 2015 - 07:23 AM
1 / 12 of you not getting itBUMP
Posted on 28 October 2015 - 07:28 AM
Appel | Appel | Car 33% you guess the car straight away
Appel | Appel 50% Your gonna know both appels
Appel | Car 50% you get the car.
I havent had this in my maths class but im pretty sure its higher then 2/3
Posted on 28 October 2015 - 08:02 AM
Automatically DeletedPosted on 28 October 2015 - 08:08 AM
Panda_Chips wrote
DO IT FOR YOUR BRAIN!
Posted on 28 October 2015 - 08:13 AM
1/3 if you don't switch3/3 if you do switch
(Original answer: 2/3 if you switch)
Reasoning:
You have a 1/3 chance to get the correct window in your initial choice.
Let's call these windows x y and z
-=IF INITIAL CHOICE IS INCORRECT=-
The judge opens window y
Window x is wrong, so that means window y has a 50/50 chance of being correct. Either way, you know which window it is in now, because you know the contents of 2 Windows.
Posted on 28 October 2015 - 09:58 AM
From not looking at the other answers, it's a 2/3rds possibility to win if you switch.If you select a window to go behind without knowing one of the doors is a dud, you have 1/3rd chance of picking the right door. Because one of the other doors reveal an apple, the probability that the prize was behind that door is transferred to the door that you have not picked(2/3rds chance to get the Ferrari) due to the fact that there was only a 1/3 chance that the Ferrari was behind your door at the initial time that you picked that door. I remember learning this exact thing in math a year ago.
Posted on 28 October 2015 - 10:14 AM
snip changed answerPosted on 28 October 2015 - 10:14 AM
Everyone's overthinking thisPosted on 28 October 2015 - 10:33 AM
100% to get the ferrari?Cuz you opened one if there is a ferrari you dont wanna switch if it is an apple he shows you the second apple so you would know that both apples and would take the third one?
Posted on 28 October 2015 - 10:50 AM
@SuperSandwish am I right