6 people have seen Band Z and Band X, we can now fill this in on our Venn diagram. Finally, if we now look at the Band X circle, we have all the sections complete except for one. Let’s add up ...

4, 9}. 30 people answered a survey about whether they have a dog or a cat. The Venn diagram shows the information from the survey. 13 people have got a dog. The circle for the set of people with a ...