Take a look at a different problem solving exercise using Venn diagrams. Remember to draw the Venn diagram and add information as you go along. This will help you keep an overview of what is going on.
Learn how to draw and interpret Venn diagrams with this BBC Bitesize Maths article. For students between the ages of 11 and 14. Intersection of two sets Learn about Venn diagrams and the relevance ...