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Mathematics 8 Online
OpenStudy (anonymous):

How many different ways can a coach select the captain and co-captain of a team from a group of 20 people?

OpenStudy (amistre64):

how many can be selected for captain?

OpenStudy (anonymous):

20 can be selected but there can only be one

OpenStudy (amistre64):

ok, now after we pick one, how many are left to pick the cocap?

OpenStudy (anonymous):

19 are left

OpenStudy (amistre64):

then in effect we have 20 ways to select 19 people. what is 20*19?

OpenStudy (anonymous):

380

OpenStudy (amistre64):

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