http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/ This is the Spreadshirt UK weblog. T-shirts, fashion, style, current events and more. Tue, 24 Nov 2009 12:42:48 +0000 http://wordpress.org/?v=2.6.3 http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-493 David Wed, 25 Apr 2007 20:45:00 +0000 http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-493 As Emigdio say, since you already know that one of the sides is black, the white|white card is discarted, leaving you with only two cards. Just one of them may by black on the reverse side too, then the probability is 50%. As Emigdio say, since you already know that one of the sides is black, the white|white card is discarted, leaving you with only two cards. Just one of them may by black on the reverse side too, then the probability is 50%.

]]> http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-492 anche Thu, 22 Feb 2007 08:42:07 +0000 http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-492 is this the famous monty hall problem and it's actually 2/3? is this the famous monty hall problem and it’s actually 2/3?

]]> http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-491 angie Wed, 21 Feb 2007 19:29:13 +0000 http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-491 i think it should be 2/3. There are three black sides. keep in mind it could be all three of those. You could either have the black side of the black/white card in your hand, or either of the black sides of the black/black card. So p should be 66.6% in my opinion. i think it should be 2/3. There are three black sides. keep in mind it could be all three of those. You could either have the black side of the black/white card in your hand, or either of the black sides of the black/black card. So p should be 66.6% in my opinion.

]]> http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-490 adam Wed, 21 Feb 2007 13:58:15 +0000 http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-490 Any other guesses? Any other guesses?

]]> http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-489 sionnach Wed, 21 Feb 2007 12:22:09 +0000 http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-489 hrmmm, phrasing of the question here is very important, could be 2/3 or 66.67% hrmmm, phrasing of the question here is very important, could be 2/3 or 66.67%

]]> http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-488 Emygdio Wed, 21 Feb 2007 05:03:24 +0000 http://blog.spreadshirt.net/uk/2007/02/20/brainteaser-2/#comment-488 Since you already know that one of the sides is black.. the white|white card is discarted, leaving you with to cards (black|black, black|white).. so i would say 50% chance? Since you already know that one of the sides is black.. the white|white card is discarted, leaving you with to cards (black|black, black|white).. so i would say 50% chance?

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