👉 Combinatorics is a branch of mathematics that deals with counting and analyzing ways in which objects can be arranged. It involves determining how many different arrangements there are for a given set of objects, such as combinations or permutations. In combinatorics, we consider the total number of possible arrangements when we have a fixed number of items to arrange. For example, if you wanted to know the total number of ways to arrange 5 books on a shelf, you would calculate it by multiplying the number