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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.

You are shown the number of arrangements of r items from n and how to use nPr function

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.

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.

How to calculate permutations where no two items the same must be together.

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