Question

Evaluate C(n, n).

A. 0
B. 1
C. n

Answer 1

`C(n,n)=(n!)/(n!(n-n)!)=\frac1{0!}=\frac11=1`

In other words, how many ways are there to choose
`n` objects from a total of
`n` objects? Just one; take all of them at the same time.