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 Edexcel study guide.

Learn about finding probabilities from Venn diagrams with this BBC Bitesize Maths article. For students between the ages of 11 and 14.