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Sammy Beahan
Answered 2021-03-01 15:57:27

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Answered 2011-02-11 19:26:42

2 people can be selected from a pool of 7 people in (7 x 6) = 42 ways.

But each group of 2 can be selected and seated in 2 ways.

So the number of different 2-person subcommittees formed from 7 people is (42/2) = 21 .

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