Thursday, February 5, 2009

joining n segments

You are given n segments. In turn, you take each one of them and join it with one among those already selected, creating either a loop or a longer segment. How many loops there are in average, at every instant of time?
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  1. I like this one, because gives you basic idea of probabilities. At a given time, how many are the chance of making a loop? how many are the chance of not making a loop? You have two components and you can sum them, considering when you create an when you don't create a loop

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