Talk:High School Mathematics Extensions/Supplementary/Basic Counting

Expansion needed
The class I'm at (in school) is recently teaching about the counting method, and it seems almost everyone(except a few like me) in my class didn't understand it. I think the explanation at this page is not very enough, and more sections can be added:

1)The 'AND' and 'OR' combination(that is things like 2*5*4)

2)Factorial and its application(For example 4!)

Then it's the ordered and then unordered selection --Lemontea 11:31, 11 Nov 2004 (UTC)


 * ✅ All covered. I'll be on the 'AND' and 'OR' combinations in the days to come, I think they would serve as a good introduction for the probability chapter. --Vito Francisco 01:58, 2 February 2016 (UTC)

Not Clear
They tried to teach this in 7th grade and did a bad job explaining it. the Wikis should do better. in the unordered selection it jumps to a formula with no explanation. --Phoebus 00:33, 4 Mar 2005 (UTC)


 * I added a bit of explanation of the general formulas, but I'm not sure if it's enough. I haven't taught classes below college level. --Jwwalker 04:30, 15 Mar 2005 (UTC)

Permutations and combinations
Isn't the things described in this chapter normally called permutations and combinations. Zginder 23:16, 13 September 2007 (UTC)


 * ✅ Added clarification. Thanks for your input. --Vito Francisco 01:58, 2 February 2016 (UTC)

Combination with repetition
To do: Needs more tangible examples and teen-friendly (less rigorous and abstract) language. --Vito Francisco 02:04, 2 February 2016 (UTC)