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Best Answer Prime, 07 November 2013 - 08:48 AM

Spoiler for I see the probability for equal speed as
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#21 bonanova

bonanova

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Posted 20 November 2013 - 11:42 PM

I actually wanted an N x N grid but since the picture specifically references a grid, i just let the group go with that.

 

I think the first part has been suggested for any N.

But inserting the 3:1 condition is difficult when N is odd.

 

Perhaps a general solution exists for a 2p x 2p grid.

I'll think about that one.


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