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Four Pins and a Rubber Band (Posted on 2005-02-10) Difficulty: 5 of 5
Four pins are randomly nailed to a square board (according to a uniform probability distribution), and a rubber band is stretched completely around them to form a convex shape. What is the probability that the rubber band is in the shape of a triangle?

See The Solution Submitted by David Shin    
Rating: 4.1000 (10 votes)

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Some Thoughts Suggestion | Comment 5 of 11 |
3 out of 4 would be my answer (or 0.75). I accept that you could make an endless number of 4 - sided polygons, but cannot fit this into the equation.
  Posted by Angela on 2005-02-15 11:43:23
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