if n < k

[Chris Johnson]

if n < k do we return 0 or "invalid"? My calculator returns 0 on such a
combination, but it is not necessarily explicit in the formula.

[TNKS]

My HP calculator returns an error, as I think it should. Choose isn't
defined in this case.

- Sukant

Post by Chris Johnson
if n < k do we return 0 or "invalid"? My calculator returns 0 on such a
combination, but it is not necessarily explicit in the formula.