11.1-11.3 · Permutations and combinationsLesson 1 of 12Free preview
Factorial notation
n! = n × (n − 1) × … × 1 counts the ways to line up n different things, and 0! = 1.
11.1-11.3 · Permutations and combinationsLesson 1 of 12Free preview
n! = n × (n − 1) × … × 1 counts the ways to line up n different things, and 0! = 1.