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What is the maximum number of communication paths for a team of twenty people?
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What is the maximum number of communication paths for a team of twenty people?

User Dmitry Ognev
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Each of the 20 people has 19 other people to communicate to. If you add that all up you get 20*19 paths, but then each path is counted twice (back and forth), so we divide this by 2. 20*19/2 = 190.

The general forumula is n(n-1)/2
User Rhys Towey
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