Combinatorics (Primary)

What is combinatorics? Combinatorics is the branch of mathematics that deals with counting — not just by listing, but by using smart rules and patterns to calculate the number of ways something can happen. We’ll explore questions like: • How many different outcomes are possible when making choices? • What’s the difference between arrangements (where order matters) and selections (where it doesn’t)? • How can we use multiplication, permutations, and combinations to solve these problems?