 | | Re: math question (or pattern... whatever...)
|
|
(...) I already proved that I should stay out of this... but. When you had 3 doors to pick from, it was 1/3 that whatever door you choose is the correct one. However, after opening one of the doors you didn't pick (assuming the host is not opening (...) (22 years ago, 4-Mar-03, to lugnet.off-topic.geek)
|
| |
| | Re: math question (or pattern... whatever...)
|
|
(...) Actually, there's a 2/3 chance that it's behind door Z! A very sneaky problem, in fact. It was shown to us in high school as the subject of a very minor controversy. After being published as "2/3 chance" in a math publication, some college (...) (22 years ago, 4-Mar-03, to lugnet.off-topic.geek)
|
| |
| | Re: math question (or pattern... whatever...)
|
|
(...) I think the two answers depend on a more accurate statement of the problem. If the problem is stated that you pick two marbles, and given that the first one you pick is red, what is the chance the second one is red, then order matters, and the (...) (22 years ago, 4-Mar-03, to lugnet.off-topic.geek)
|
| |
| | Re: math question (or pattern... whatever...)
|
|
(...) doh, you're right :) Also, I was calculating the chance of getting 2 red marbles, in general, not checking the chance given the first one was red... :) That's what you get when you do an experiment, and have an expected solution in your (...) (22 years ago, 4-Mar-03, to lugnet.off-topic.geek)
|
| |
| | Re: math question (or pattern... whatever...)
|
|
In lugnet.off-topic.geek, Dave Schuler writes: <snip> (...) I'd say that me drawing a red one is 1 in 3, and you drawing a red one is one in 3 so the chances are for us to draw a red at the same time is 1 in 9. The chances to draw a blue one at the (...) (22 years ago, 3-Mar-03, to lugnet.off-topic.geek)
|
| |
| | Re: math question (or pattern... whatever...)
|
|
(...) I don't quite get why this works-- if you're doing rand($#bag), won't that always pick r, r, or w for the 1st value? Hence, theoretically, you could pick "wb", which isn't in your sample set... on the other hand, you're increasing the chance (...) (22 years ago, 3-Mar-03, to lugnet.off-topic.geek)
|
| |
| | Re: math question (or pattern... whatever...)
|
|
In lugnet.off-topic.geek, David Eaton writes: <snip> (...) I'd say 1 in 2, or 50 percent, but maybe I'm missing something. Good question though. Dave K (22 years ago, 3-Mar-03, to lugnet.off-topic.geek)
|
| |
| | Re: math question (or pattern... whatever...)
|
|
In lugnet.off-topic.geek, Ross Crawford writes: <snip> (...) I like driving home from work--gives me time to think about stuff... And after reading all the great replies, I'm going to propose the following solution: If you have a bag with 4 marbles, (...) (22 years ago, 3-Mar-03, to lugnet.off-topic.geek)
|
| |
| | Re: math question (or pattern... whatever...)
|
|
(...) Your friend has assumed that there is a difference between the reds, and you know which one you have seen in your hand. As there is no information in the original problem to substantiate this assumption, you have to assume it's not the case, (...) (22 years ago, 3-Mar-03, to lugnet.off-topic.geek)
|
| |
| | Re: math question (or pattern... whatever...)
|
|
In lugnet.off-topic.geek, Larry Pieniazek writes: <snip> (...) Thanks Larry, I'll add it to the rationale. I failed gr. 12 advanced math once--was too busy being the editor of the yearbook that particular year (and playing cards in the cafeteria) It (...) (22 years ago, 3-Mar-03, to lugnet.off-topic.geek)
|
