Resolved: Combinatorics notes

Can I point out that the notes for this section are not ideally presented ? It would help if combinations with repititions were included in the Section 2 Course notes - which apart from that is a handy reference to the different functions. Having it "hidden" in another document (especially as it's the hardest formula to remember) is a littel irritating - even if that separate document is giving a full explanation of it's derivation.