perplexus.info :: Probability : Four Pins and a Rubber Band

Four Pins and a Rubber Band (Posted on 2005-02-10)

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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Subject	Author	Date
Answer	K Sengupta	2008-03-03 11:02:36
Numerical solution	Bob Smith	2005-06-15 21:07:38
re: i ve got it	chris	2005-02-26 06:28:05
re: about the solution	Steve Herman	2005-02-20 21:05:12
about the solution	Charlie	2005-02-20 16:35:28
i ve got it	Clara Levy	2005-02-18 19:57:17
Suggestion	Angela	2005-02-15 11:43:23
Spoiler -- I concede	Steve Herman	2005-02-12 14:00:03
formal solution	ronen	2005-02-12 11:31:06
re: thoughts--and a simulation	Steve Herman	2005-02-11 18:00:39
thoughts--and a simulation	Charlie	2005-02-10 18:07:01

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