Finding a combination
1. Place the insertion point on the Entry line, then tap the Binomial
button in the lower-left corner of the Expression Tab. Maple displays
binomial(?,?) on the Entry line.
2. Replace the first question mark with the value for n, TAB to the
second question mark and replace it with the value for r.
3. Press ENTER.
Finding a permutation
Maple does not have a command to find a permutation directly, but it
can calculate the value. For example, find P(6,4), using the formula
P(n,r) = n!/(n-r)!.
1. On the Entry line, enter the following. 6!/2!
2. Press ENTER.
