CPM Homework Help : INT2 Problem 12-35

For the each of the following, write down a factorial expression and then compute the value. Use the $_nC_r$ and $_nP_r$ functions on your calculator to make the computation.

$_{10}P_8$
Answer (a):
$\frac{10!}{2!} = 1{,}814{,}400$

$_{10}C_8$
Answer (b):
$\frac{10!}{8!2!} = 45$

$_6C_1$
Answer (c):
$\frac{6!}{1!5!}=6$

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