mersenneforum.org A Needle on a Crack
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 2009-10-31, 22:43 #12 davieddy     "Lucan" Dec 2006 England 2×3×13×83 Posts I knew there was an appropriate song somewhere. Here it is; enjoy http://www.youtube.com/watch?v=zhVXsBn1pOw
2009-11-04, 20:25   #13
storm5510
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Aug 2009
Not U. + S.A.

2·33·47 Posts

Quote:
 Originally Posted by Primeinator A needle 2 inches long is dropped at random onto a floor made with wooden boards 2 inches in width, placed side by side. What is the probability that the needle falls across one of the cracks? Calculus and very basic statistics required
What is the probability that the needles' point would land directly into one of the cracks, causing the needle to stand upright?

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