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How many different line-ups can the team make?

1- There are nine different positions on a baseball team. If a team has 12 players how many different line-ups can the team make?
 
2-Baseball games consist of nine innings. A team wants to change its line-up every inning. If no game goes to extra innings, and a season consists of 195 games, how many complete seasons can the team play without repeating a line-up?

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Parviz F. | Mathematics professor at Community CollegesMathematics professor at Community Colle...
4.8 4.8 (4 lesson ratings) (4)
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1.  C 12 = 12! / ( 5!) ( 7!)
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