Probability and Combined Events | Year 9 Maths PowerPoint Lesson

Turn probability from guesswork into a method. This visual, colourful, ready-to-teach PowerPoint walks Year 9 pupils through the probability scale, complements, mutually exclusive events, sample space diagrams, relative frequency and the multiplication rule, finishing with tree diagrams with and without replacement. Fully worked examples show every step, and two interactive, hands-on activities, a dice sample-space investigation and a game-design task, let pupils test the theory. A dedicated misconceptions slide tackles the gambler’s fallacy and “50:50” thinking, and a GCSE-style question shows where the topic leads, so it builds towards GCSE. Non-specialist friendly, with a clear hint on every slide, it works as a full hour-long lesson or a dependable cover lesson. 18 slides.