Sagot :
If position does not matter,
C(n,r)=C(12,5)
=12!/(5!(12−5)!)
=12!/(5!×7!)
= 792 ways
If position matters,
P(n,r)=P(12,5)
=12!/(12−5)!
= 95040 ways
If position does not matter,
C(n,r)=C(12,5)
=12!/(5!(12−5)!)
=12!/(5!×7!)
= 792 ways
If position matters,
P(n,r)=P(12,5)
=12!/(12−5)!
= 95040 ways