Don’t get confused if I use them interchangeably, which I probably will. Oh, and as you’ve probably noticed, 'combinatorics', 'hand combinations' and 'combos' refer to the same thing in poker. In this article, I will go through the basics of working out hand combinations or 'combos' in poker and give a few examples to help show you why it is useful. 'Combinatorics' is a big word for something that isn’t all that difficult to understand.
For a great training video on poker combinatorics, check out this poker combos video.