Counting Principles HL
This page deals with all the counting principles in the HL course: Arrangements, Permutations and Combinations. You need to be familiar with combinations for the Binomial Theorem, but it is also useful in its own right to be able to work out, for example, how many ways there are of getting a hand of blackjack in a card game or finding how many different tickets are possible in a lottery. There is always more than one...