Probability | Edexcel GCSE Foundation | 40 Worked Examples

40 fully worked, exam-style questions on probability, written for Edexcel GCSE Foundation Tier Maths (1MA1). Every single question has a complete step-by-step worked solution, mark-scheme style annotations (M1, A1, B1, C1) at every stage, and a clearly stated final answer, so students can mark their own work and see exactly where each mark is won or lost.

This pack is built for Foundation students who want confidence, not jargon. It uses clear diagrams throughout: probability scales, sample-space tables, frequency trees, probability tree diagrams and Venn diagrams, all drawn out and explained, exactly matching the way Edexcel presents probability on Papers 1, 2 and 3.

The pack builds gently from the basics up to genuine exam-standard problem solving, and stays fully inside the Foundation specification (P1 to P8). It covers: the probability of a single event, the 0 to 1 probability scale and probability words, the ‘not’ rule and probabilities summing to 1, mutually exclusive events, listing outcomes and sample-space diagrams, two-way tables, relative frequency and expected frequency, frequency trees, Venn diagrams, and tree diagrams for both independent and dependent (with and without replacement) events, including ‘at least one’ by the complement.

What’s inside:
Easy: single-event probability, the probability scale and probability words, the ‘not’ rule, mutually exclusive colours summing to 1, expected frequency, relative frequency and listing simple outcomes.
Standard: two-way tables, sample-space grids for two dice or two spinners, frequency trees, independent and without-replacement tree diagrams, Venn diagrams, and estimating a probability from data.
Challenging: same-colour and ‘at least one’ problems without replacement, three-draw problems, two-stage tree problems, reverse counting from a given probability, and ‘is the coin biased’ reasoning, with extra worked explanation of the classic exam traps.

Ideal for Year 10 and Year 11 students sitting Edexcel GCSE Foundation Tier Maths (1MA1), plus tutors and teachers who want ready-made, self-marking homework or revision material on probability.