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| Tweet Topic Started: Jan 30 2013, 10:20 PM (722,651 Views) | |
| Yuwree | Jul 25 2013, 05:13 AM Post #26741 |
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Official Pine Tree
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I just realised that I never learnt fractions, probability or ratios. Im well on track to becoming the worst scientist ever |
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| Ihla | Jul 25 2013, 05:15 AM Post #26742 |
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I need insoles
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Brity...wat?
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| Artichoke | Jul 25 2013, 05:15 AM Post #26743 |
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nam fuit ante Helenam cunnus taeterrima belli causa
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Awww my male best friend is offline, I was gonna send him that problem. |
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| orangedaffodils | Jul 25 2013, 05:15 AM Post #26744 |
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Let ε <0
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Brity u bish
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| Artichoke | Jul 25 2013, 05:17 AM Post #26745 |
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nam fuit ante Helenam cunnus taeterrima belli causa
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Was my reasoning sound? I need to knooow.
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| paper.star | Jul 25 2013, 05:18 AM Post #26746 |
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s l e e p y
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@orange omg too complicated. i just thought that if every single seat was taken, the probability of an empty seat being mine is 1/100 |
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| Artichoke | Jul 25 2013, 05:19 AM Post #26747 |
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nam fuit ante Helenam cunnus taeterrima belli causa
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That's only if there's a mad dash for seats and everyone sits at the same time *randomly, IF I AM CORRECT. Since every seating is a separate event, the probability of it being yours or not would be 50/50 every time, since there are only two options for good ol' Centus, and they're equally likely. |
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| orangedaffodils | Jul 25 2013, 05:19 AM Post #26748 |
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Let ε <0
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No, it's right - just a little rough around the edges; no complex formula needed! ![]() it's a pretty easy induction argument to show that the probabilities of each passenger having to choose a seat other than their own increase straightforwardly from 1/100 to 1/99 to 1/98, etc. Intuitively, at any point, all the seats that are taken except possibly one have either been claimed by the passenger assigned to that seat or been passed over by the passenger assigned to that seat, because it was randomly claimed by someone else, as you've stated. So there's really only one randomly chosen seat. this is one of my favorite problems of all time, now y'all know that.
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| Artichoke | Jul 25 2013, 05:21 AM Post #26749 |
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nam fuit ante Helenam cunnus taeterrima belli causa
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That explanation seems more logical. I AM ENJOYING MY LIFE RIGHT NOW. If y'all have any more problems...
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| paper.star | Jul 25 2013, 05:23 AM Post #26750 |
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s l e e p y
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ohhhh, makes sense
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| Artichoke | Jul 25 2013, 05:25 AM Post #26751 |
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nam fuit ante Helenam cunnus taeterrima belli causa
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^ I added a pretty important word to that in my edited post. It's important that every choice is a random choice and that all choices are happening at the same time, otherwise I think it'd still be 50/50, but idk. :x This reminds me that I need to bash Professor Layton again. |
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| babycakes | Jul 25 2013, 05:29 AM Post #26752 |
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wow have i been out of high school that long that they've stopped teaching this stuff?? @Arti: have you tried solving the einstein quiz? someone threw away the tissue on which i'd worked it out it's not mathematical though
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| orangedaffodils | Jul 25 2013, 05:29 AM Post #26753 |
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Let ε <0
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It has to be random. and no, all the choices are not happening simultaneously, they're happening consecutively since the passengers board one at a time. ie; the passenger on board takes their seat before the next steps on, and so on and so forth. I can ask another question is y'all want, i'm just taking old practice math olympiad problems that I happened to find in a folder that I thought to be empty
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| Brity Spear | Jul 25 2013, 05:30 AM Post #26754 |
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-haAHAHHAHAHAAH sorry |
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| Artichoke | Jul 25 2013, 05:37 AM Post #26755 |
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nam fuit ante Helenam cunnus taeterrima belli causa
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Yeah, I didn't think that through. Guess I got cocky. And, yes! Sure. I would enjoy that, as long as they're more logic than maths, like this one was. I'm not as good with maths as I used to be, since I've not done it for 2 years. Nope. What is it? |
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| babycakes | Jul 25 2013, 05:42 AM Post #26756 |
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it's a brain teaser of sorts, it's not very difficult but i had fun. just go0gle |
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| Guest | Jul 25 2013, 05:43 AM Post #26757 |
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Unregistered
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Yeshh another problem pls. Felt good when I finally understood your inductive reasoning solution to the airplane problem
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| orangedaffodils | Jul 25 2013, 05:44 AM Post #26758 |
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Let ε <0
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K, found another probability type problem: You paint the surface of a solid wooden cube blue. why, blue? I don't fucking know. You cut the cube into 27 smaller cubes in the natural fashion. You throw all the small cubes into a bag, pick one at random, put in on the table, and see that the 5 visible faces of the smaller cube are unpainted. What is the probability that the hidden face of the small cube is blue? Again, if you attempt to g00gle the answer, I'LL KNOW
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| Guest | Jul 25 2013, 05:44 AM Post #26759 |
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Unregistered
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I want another tinychat session.
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| Yuwree | Jul 25 2013, 05:46 AM Post #26760 |
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Official Pine Tree
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20%? Im not even trying :c |
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| babycakes | Jul 25 2013, 05:50 AM Post #26761 |
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.2222 ? |
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| Guest | Jul 25 2013, 05:50 AM Post #26762 |
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Unregistered
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answer?
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| orangedaffodils | Jul 25 2013, 05:51 AM Post #26763 |
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Let ε <0
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nah, that's approx. the probability that you'll choose a cube with exactly one face painted if you take one cube from the bag at random. Keep trying!
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| Guest | Jul 25 2013, 05:51 AM Post #26764 |
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Unregistered
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wait when you say paint the surface do you mean the entire surface or just one face of the cube |
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| orangedaffodils | Jul 25 2013, 05:52 AM Post #26765 |
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Let ε <0
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I mean you paint all 6 faces blue. |
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| Windmill | Jul 25 2013, 05:52 AM Post #26766 |
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Gertrude
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Then go make one and strip for us anon. This might scare the anon away though... |
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| orangedaffodils | Jul 25 2013, 05:53 AM Post #26767 |
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Let ε <0
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| Guest | Jul 25 2013, 05:54 AM Post #26768 |
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Unregistered
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sa Spoiler: click to toggle
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| Artichoke | Jul 25 2013, 05:55 AM Post #26769 |
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nam fuit ante Helenam cunnus taeterrima belli causa
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Just looked it up, and that's easy, tho. The answer is "you can't". You can see from the question it mentions 4 pets, but the fish isn't mentioned anywhere in the facts, so the 5th person with the unstated pet might not have a fish, but in fact have a snake, or something like that. There is no assurance that the 5th pet is a fish, so you can't determine who has it through facts alone. Now I don't want to answer in case I mess it up and ruin my ~rep~... ...1/7? |
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| Artichoke | Jul 25 2013, 05:57 AM Post #26770 |
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nam fuit ante Helenam cunnus taeterrima belli causa
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Aw fuck, idk, that's a faux pas. im not even going to correct that I'M NOT GOING TO CLICK "EDIT" UNTIL I HAVE THIS SORTED OUT IN MY HEAD. Allow me to consult my Rubik's cube for cube reference because I can't spatial recognition. nvm |
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| babycakes | Jul 25 2013, 05:59 AM Post #26771 |
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oic i did it backwards? i haven't done math in so long though idek .. i'm going to guess .1111 then @Arti: you're right and that's the more correct answer (logically) although it's simpler (for the purposes of the brain teaser) to assume the person who doesn't not have a pet fish does have a fish as a pet rather than any other random animal
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| orangedaffodils | Jul 25 2013, 06:00 AM Post #26772 |
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Let ε <0
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Crap, I forgot to give the hint: it's not 6/7 |
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| Dyslexia | Jul 25 2013, 06:00 AM Post #26773 |
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| HolyYoong | Jul 25 2013, 06:01 AM Post #26774 |
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My shupanova
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My cat is touchy today.. |
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| Die Zicke | Jul 25 2013, 06:02 AM Post #26775 |
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Caffeine is good for you.
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... since when did we stop talking about desserts?! |
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This might scare the anon away though...


9:06 PM Jul 11