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[Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 2:19 pm
by Mike
You have a bag with three cards in it. One card is blue on both sides. One card is red on both sides. The last card has one red side and one blue side.
Without looking, you pull a random card from the bag and place it on the table. When you look, you see that the side facing up is blue. What is the probability that the other side of that card is blue?
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 2:55 pm
by Kyle
Is this just another expression of the Monty Hall problem?
Answer:
At least, that's my take on it.
Unless this is the inverse of the Monty Hall problem.
Or when you say, "What is the....
Fuck this. I'm overthinking this. I don't know.
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 2:57 pm
by Kyle
No. I'm changing my answer:
Fuck you, Mike. And fuck you to this stupid problem because I"m still not sure that's right.
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 2:58 pm
by Mike
It's not. Sorry.
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 3:00 pm
by Kyle
I looked up the answer.
Fuck you.
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 3:21 pm
by Mike
I woulda told you.
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 3:38 pm
by Zen
I would think...
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 3:47 pm
by Mike
That is everyone's initial reaction, and it is wrong. This puzzle is labeled as "Counter-intuitive."
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 3:52 pm
by Eliahad
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 3:56 pm
by Mike
Eli is a smarty.
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 4:47 pm
by Zen
It has been eons since I did this crap...
Re: [Puzzler] Red & Blue cards
Posted: Wed Jul 19, 2017 4:55 pm
by Mike
Exactly. Way counter-intuitive.
Re: [Puzzler] Red & Blue cards
Posted: Thu Jul 20, 2017 11:29 am
by Stan
Re: [Puzzler] Red & Blue cards
Posted: Thu Jul 20, 2017 10:35 pm
by Phoebe
I've seen this one in a different context and forgot what I was supposed to recall about it.