Username or email
Forgot your username or password?
Create an account!
Counting Methods and Probability
Applying the Counting Principle and Permutations
Using a Tree Diagram
Drawing a Tree Diagram to Count Number of Ways
Fundamental Counting Rule
Using the Fundamental Counting Rule without Repetition
Using the Fundamental Counting Rule with Repetition
Finding the Number of Permutations
Finding Permutations of n objects taken r at a time
Finding Permutations with Repetition
Explore More at
Move on to the next skill