GCSE & iGCSE Basic Probability worksheet

Basic probability worksheet for GCSE and iGCSE maths: the probability scale, equally likely outcomes and probabilities summing to 1. With full solutions.

A complete basic probability worksheet for Pearson Edexcel GCSE (1MA1) and International GCSE (4MA1), written so one resource works for both tiers. Every section is clearly labelled Foundation or Higher, and questions get harder as you go.

What’s covered — Foundation

Using the probability scale, and writing probabilities as fractions or decimals
Finding probabilities of equally likely outcomes
Using the fact that probabilities add up to 1

What’s covered — Higher (grades 6 to 9)

Probability tables involving algebra
Spinner angles
Finding totals from probabilities
Probabilities from areas

How it’s structured

A. Worked examples & Your turn — a model solution beside a matching question to try
B. Fluency — core skills
C. Reasoning — explain it
D. Problem solving — unfamiliar, multi-step questions
E. Exam practice — exam-style questions with mark allocations

124 marks across Sections B to E (63 Foundation, 61 Higher), with a progress tracker on the front page so students can record their score per section. The Higher section turns the sum-to-1 rule into algebra, which is where this topic actually earns marks beyond grade 4.

How to use it

Works as a full lesson, homework, a cover lesson or targeted intervention. Because each tier is labelled, you can set the Foundation sections to one group and the Higher sections to another from the same print.

What’s included

13-page worksheet (PDF, printable, with answer spaces)
7-page full worked solutions (PDF) — complete method for every question, not just final answers
No calculator

Specification

Pearson Edexcel GCSE Mathematics (1MA1) and International GCSE Mathematics (4MA1), Probability. All questions are original.