This MathWorld site is a lite to link to a multitude of sites involving permutations. Look through to find your specific needs. If you are looking at this site with regards to a probability and statisics class you will probably want to...

[Free Registration/Login may be required to access all resource tools.] Determine all the possible permutations in a probability problem.

Discussion of permutations and combinations using examples and a video lesson. [1:15]

Practice using your graphing calculator for factorial, combination, and permutation expressions. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly under each problem.

[Free Registration/Login may be required to access all resource tools.] This lesson covers how to define and calculate combinations of objects and recognize the difference between a combination and a permutation.

In this Cyberchase video segment, Matt and Jackie must figure out which combination of knob and key will get them one step closer to retrieving the Black Crystal.

This 4-problem quiz/practice using introductory combination problems like if you have 5 friends and can pick 2 of them to join you on a boat ride, how many different groups of friends could you take with you?

If you're good with numbers, then here's a challenge just for you. See if you can figure out how many three number combinations you can make using numbers from 0 to 39. A probability challenge that explores number arrangements. Taken...

The combination function is used to solve probability counting problems. Several examples are presented with detailed solutions.

Use Glencoe's Math Course 2 randomly generated self-checking quiz to test your knowledge of combinations. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check It"...