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OpenStudy (anonymous):
How many different ways can a coach select the captain and co-captain of a team from a group of 20 people?
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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?
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OpenStudy (anonymous):
380
OpenStudy (amistre64):
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