Wesley Crusher
Wesley Crusher answered Anonymous' question

Khanacademy is your best bet. Especially with general-ed classes at community college. Right now Udemy is having a sale for all courses. The instructor for master calculus 1-4 is top notch and it's only 10 dollars for each right now compared to $200 normally.  I'll post links when I'm home.

And since you're taking online math, … Read more

Tom  Jackson
Tom Jackson answered

From the Internet---

The Fundamental Principle of Counting:

If something can be chosen, or can happen, or be done, in m different ways, and, after that has happened, something else can be chosen in n different ways, then the number of ways of choosing both of them is 

m ยท n.