1. 8-2:Permutations and Combinations English Casbarro Unit 8

2. A permutation is all possible arrangements of people or things where order is important. A linear permutation is the arrangement of people or objects in a line.

6. Permutations with repetition Ex. In how many ways can you arrange the letters in geometry?

8. For our first example, we had the following problem. Suppose it had said instead: “Ten students are in a race. The top three will move on to the finals”. Does it matter now which is first, which is second, or which is third? In this situation, you use a combination.

9. Ten students are in a race. The top three will move on to the finals. How many ways can this happen? Order is not important here– so you would use combinations. It is written 10 C 3.

11. Deciding whether order is important

13. and arrange the four drawings from left to right on the wall?