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Ann [662]
3 years ago
8

There are 20 members of a basketball team.

Mathematics
1 answer:
spin [16.1K]3 years ago
3 0

Answer:

a)125970

b)95040

c)35640

Step-by-step explanation:

a) selecting 12 player from 20 players can be one in ^{20} C_{12}

 ^{20} C_{12} = \frac{20!}{12!X (20-12)!}

          =  \frac{20!}{12!X8!}

          = 125970

b) since each position has an identity permutations can be used so

   Number of ways = ^{12} P_{5}

                                = \frac{12!}{(12-5)!}

                                = \frac{12!}{7!}

                                = 95040

c) coach permutes 4 players for position other than centers in  ^{12}P_{4} ways and selects center in 3 ways

  so, number of ways = ^{12}P_{4}X3

                                     =\frac{12!}{8!}X3

                                     =35640

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