Lesson 3

Lesson 3 Summary

 

In this lesson you learned how to find the number of permutations of objects in several ways, including making a list, drawing a tree diagram, drawing blanks, using the fundamental counting principle, and using the permutation formula nPr. You learned that there are fewer permutations if there are identical items and that some methods are better and more efficient than others, depending upon the question posed.

 

The order the objects are placed is important when determining permutations. In the next lesson you will look at methods for counting ways of arranging objects when the order is not important.