The language with the most letters in it is Cambodian, which has 72 letters.

b) How many three-letter permutations can be created if the letters?maybe repeated

The options would look something like this: AAABBBCCCDDDEEEFFF...

So I tried: $\displaystyle \frac{72!}{72(3!)}$ but that was too big for my calculator.

I don't know how else to solve this.

Any help is greatly appreciated.