 # Permutation and Combination Tutorial

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More Lessons for A Level Maths

Math Worksheets

A collection of videos, activities and worksheets that are suitable for A Level Maths.

Permutations of n different items
In this tutorial, I show you what we mean by a permutation, and how to work them out for n different items.
Permutations of r items taken from n, nPr
You are shown the number of arrangements of r items from n and how to use nPr function

Permutations where letters are repeated in a word
In this video tutorial, I show you how to calculate how many arrangements or permutations there are of letters in a word where a letter is repeated. The words EYE and STATISTIC are used as examples.
Permutations with restrictions - letters/items stay together
You are shown how to handle questions where letters or items have to stay together.

Permutations where items are restricted to the ends
In this tutorial I show you how to calculate how many arrangements or permutations when letters or items are restricted to the ends of a line.
Permutations with restrictions : items not together
How to calculate permutations where no two items the same must be together.

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.  