Question

Evaluate 9P4

Answer 1

9s divided by 4s

Answer 2

9.8.7.6.5.4.3.2
------------- = 9.8.7.6.5
4.3.2

Answer 3

\[\huge \color{green}{^nP_r = \frac{n!}{(n-r)!}}\]

Here, put n = 9 and r = 4..