# [probability] any help with this challenging problem?? explanations appreciated

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• April 23rd 2013, 12:32 PM
animalmanny
[probability] any help with this challenging problem?? explanations appreciated
• April 23rd 2013, 02:47 PM
HallsofIvy
Re: [probability] any help with this challenging problem?? explanations appreciated
In any two by two sub-grid, there are $4^4= 64$ equally likely "configuration". Only one such configuration gives a circle.
• April 23rd 2013, 10:05 PM
animalmanny
Re: [probability] any help with this challenging problem?? explanations appreciated
i got it, thanks for your help.