Counting is not just tallying objects. It's answering questions like: How many passwords are possible? How many paths exist? How many ways can you arrange items?
In this section, I'll teach you the two fundamental rules that solve nearly all counting problems: the sum rule and the product rule. You'll learn when to add and when to multiply.
By the end, you'll count combinations, paths, and passwords without hesitation. These principles are the foundation for all combinatorics.