Answer:
a)125970
b)95040
c)35640
Step-by-step explanation:
a) selecting 12 player from 20 players can be one in
=
=
=
b) since each position has an identity permutations can be used so
Number of ways =
=
=
=
c) coach permutes 4 players for position other than centers in ways and selects center in 3 ways
so, number of ways =
=
=