True or false. P (n, r) = r! C (n, r).
explain why please, thanks
LS = P(n,r)
= n!/(n-r)!
RS = r! C(n,r)
= r! n!/(r!(n-r)! )
= n!/(n-r)!
= LS
True!
explain why please, thanks
= n!/(n-r)!
RS = r! C(n,r)
= r! n!/(r!(n-r)! )
= n!/(n-r)!
= LS
True!