Question

EVALUATE THE FOLLWING:A. nPn = B. 92!/82!C. nCn=

Answer 1

Answer:

nPn = n!

Step-by-step explanation:

Note that:

`nPr=(n!)/((n-r)!)`

To get nPn, let r = n

`\begin{gathered} nPn=(n!)/((n-n)!) \\ \\ nPn=(n!)/(0!) \\ \\ nPn=(n!)/(1) \\ \\ nPn=n! \end{gathered}`

Therefore, nPn = n!