Tree diagrams, also known as probability trees or decision trees, are quite versatile and may be useful in many fields, including finance.

Learn about and revise how to write probabilities as fractions, decimals or percentages with this BBC Bitesize GCSE Maths Eduqas study guide.

Tree diagrams are a way of showing combinations of two or more events. Each branch is labelled at the end with its outcome and the probability is written alongside the line.