<p>I understand the door problem, although when I first heard it (a looong time ago) I argued tooth and nail for the irrelevance of switching. :p</p>
<p>Very soon I discovered my intuition wrong. :)</p>
<p>I always want to say that you shouldn't switch doors either...
because what if you hadn't picked a door in the first place, then they opened one of the three. That's like saying one of the others has a greater chance than the other.</p>
<p>Uhhh idk don't listen to me, the girl who thinks probability depends on intent and volume...lol.</p>
<p>wow, really?? (to moodrets)
yay!!! i have influenced someone's mathematical logic!!
this is a splendid moment in my young life =]</p>
<ul>
<li>this deserves a moment of silence *</li>
</ul>
<p>the door problem was talked about in the movie 21 with that kid from across the universe.</p>
<p>really?? i haven't seen that movie</p>
<p>Hehe, I didn't quite learn of my mistake from your post per say, but rather "very soon" after "a looong time ago." :p</p>
<p>Your post was still a fun reminder of the problem though. :)</p>
<p>edit: although to be fair I "cheated" and didn't figure it out by myself, but instead just looked it up :o</p>
<p>^^You'd love it, this group of kids from MIT or somewhere decide to work the poker game 21 in their favor with math and stuff lol.</p>
<p>yeah. he's a student and MIT and his professor chooses him to answer the question of whether or not to switch. he says switch and everyone around him looks at him like he's an idiot. so he explains why and then the professor praises his superior math abilities.</p>
<p>then they start counting cards. the movie kinda sucked.</p>
<p>ohh yeah!! that movie! i saw the previews and wanted to see it sooo bad!! but then i went to china.....
=[</p>
<p>i'd take china over any movie any day.</p>
<p>Another fun probability question is:</p>
<p>How many people must be in a group so that the probability of any 2 sharing a birthday is >50% (assuming random birth-dates).</p>
<p>^haha i guess
i love stuff with math
gosh i would love to go to MIT but those people are HUGE math nerds!!!!</p>
<p>I really don't get why switching doors is the better strategy. How could it be, since, right from the start, the Ferrari is behind, say, door 1. Even if the host narrows it down to door 1 and door 100, HOW does the probability suddenly jump for door 100 MORE than it does for door 1?</p>
<p>Please enlighten me. I hate math.</p>
<p>This stuff hurts my brain... Good thing I plan to major in the social sciences instead.</p>
<p>Kaznack I agree with you.. I don't understand it at all.</p>
<p>I still don't understand why it doesn't just go to 50/50 for that... uhh I am the dumbest salutatorian ever.</p>
<p>Every time I hear this problem, I think I get it, and then I think about it again. I've learned to just accept what people tell me when it comes to math, and allow my questioning mind to flourish in social studies instead. ;) Hooray for only having to take 1-2 math classes more in college!!</p>
<p>It's because the door that you chose was eliminated from the applicant pool of doors that the host would open (to reveal the wrong door).</p>
<p>Dr</a>. Math explains it better than I could.</p>
<p>edit: Oooh, and the [url=<a href="http://en.wikipedia.org/wiki/Monty_Hall_problem%5Dwiki%5B/url">http://en.wikipedia.org/wiki/Monty_Hall_problem]wiki[/url</a>] has nice little explanatory pictures!</p>
<p>^ Uhhh</p>
<p>Okay thanks Moodrets, I understand now :]</p>
<p>EBM, no matter how many times you say it that way, it's not going to make sense to most people who don't understand it already. I understood the Dr. Math thing.</p>