The Venn diagram shows the information from the survey. 13 people have got a dog. The circle for the set of people with a dog has 5 people who just have a dog and 8 people who have both a cat and ...

You may be asked to solve problems using Venn diagrams in your exam. It is really important you draw the Venn diagram and add information as you go along. This will help you keep an overview of ...