How long would it take to break into a safe by testing every possible combination of codes? Pupils view a video clip of this happening and must determine the total amount of time before success. They measure how long each step takes, add...

An article written for teachers with recommendations on how to present permutations, combinations, and the binomial theorem to students. It contains both useful suggestions about order of presentation and many class examples. A good...

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.

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.