Respuesta :

A permutation is where there is a difference in positions where the things will be selected into (order matters). Combination is where order doesn’t matter. I have sorted them but I am not sure about the starting line up one. If the players are selected into specific positions then it would be a permutation.

If order matters then that's permutation else that's combination

So

Here the answers are

#1

Teams cannot be repeated

  • Permutation

#2

Teachers also can't be repeated

  • Permutation

#3

Can't repeat

  • Permutation

#4

Already mentioned

  • Permutation

#5

Repeating allowed

  • Combination

#6

Can be repeated

  • Combination

#7

Can't be repeated

  • Permutation

#8

Can be repeated

  • Combination

#9

  • Combination