Use a Venn diagram
- Put the overlap in first.
- Fill the remaining parts.
- Add regions needed by the question.
Answer: A or B = A + B - both
🎲 Probability
Venn diagrams
Learn venn diagrams with a GCSE-style explanation, help guide, worked example, practice question and flashcards.
Global XP
Level 10 / 100 XP
1. Explanation
Key idea
- Venn diagrams is part of probability and appears often in KS3–GCSE maths.
- Venn diagrams show sets and overlaps.
- Use the worked model, help guide, interactive question and flashcards to practise venn diagrams until the steps feel automatic.
Real-life examples
- Shopping, sport, travel, science, design and everyday decisions all use this skill.
2. Visual
Venn diagrams learning map
Understand the key idea → follow the help guide → practise a question → check your method → build speed with flashcards.
3. Help guide
How to tackle Venn diagrams
- Learn the rule: Venn diagrams show sets and overlaps.
- Worked model: Put the overlap in first. Fill the remaining parts. Add regions needed by the question.
- Try the interactive question without looking at the answer first.
- Use the flashcards to test the rule, the method and a common check.
4. Worked examples
Step-by-step working
5. Interactive questions
Try it yourself
In a class, 12 like cats, 10 like dogs and 5 like both. How many like cats or dogs?
6. Flashcards
Master quick recall
Flip each card, then choose whether you know it or need more practice.
0 mastered
FrontRule for Venn diagrams
BackVenn diagrams show sets and overlaps.
FrontExample answer: In a class, 12 like cats, 10 like dogs and 5 like both. How many like cats or dogs?
Back12 + 10 - 5 = 17 because the overlap was counted twice.
FrontCommon check for Venn diagrams
BackCheck units/notation, compare with an estimate, and make sure the answer matches the question.
7. Finish
Complete this topic
When you have read the examples, tried the question and reviewed flashcards, claim your topic completion XP.