This will help you keep an overview of what is going on. Remember to draw the Venn diagram and add information as you go along. Take a look at a different problem solving exercise using Venn diagrams. We can now fill this in on our Venn diagram.ġ6 visitors had seen Band X, but not Band Y or Band Z. So 16 people are left over to go in the section that is blank. You can see we have 20 people so far, but we know 36 people saw Band X: Let’s add up the numbers we have so far in this circle: 6 people have seen Band Z and Band X, we can now fill this in on our Venn diagram.įinally, if we now look at the Band X circle, we have all the sections complete except for one. So 6 people are left over to go in the section that is blank. You can see we have 47 people so far, but we know 53 people saw Band Z: If we now add up the numbers we have so far in Band Z's circle: If we now look at Band Z circle, we have all the sections complete except one. Therefore, 21 people have seen Band Y and Band Z.
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You can see we have 34 people so far, but we know 55 people saw Band Y:Ģ1 people are remaining and go in the blank section. Now add up the numbers we have so far in Band Y circle: If we now look at the Band Y circle, we have all the sections complete except one.
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How many visitors had seen Band X but not Band Y or Band Z? Solutionįirst of all, work out how many people have seen Band X and Band Y only:ġ1 visitors have seen Band X and Band Y only.