Asked by deanna

A baseball team has 13 players; how many possible batting orders can the coach make if there are 9 players in the batting lineup?

Answers

Answered by Alexander
13 choose 9

13!/(9!*4!)
Answered by Reiny
Batting "order" implies that the order they play is important, so

13 P 9
= 13*12*11*10*9*8*7*6*5
= ....
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