Question

Evaluate C(n, n).

Answer 1

\[nC _{r}= \frac{ ! n }{ !r * !n-r }\]

Answer 2

o.O

Answer 3

how many ways can you choose 3 pennys if all you have is 3 pennys?

Answer 4

fact 3

Answer 5

you can only choose n items if all you have is n items, in 1 way

Answer 6

do you want peas with your liver? or liver with your peas? :)

Answer 7

alright, i get it.