This section explores the foundational ideas of probability, starting with elementary events and their basic properties. Use this page to revise the following concepts within basic probability: Sample ...

GCSE Edexcel Probability - Edexcel Tree diagrams Probabilities can be written as fractions, decimals or percentages on a scale from 0 to 1. Knowing basic facts about equally likely outcomes can ...

Understanding probability is crucial to many industries, such as finance and medical professions. This guide contains information on the AND/OR rules, tree diagrams and sampling without replacement.