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You may be asked to solve problems ... Z's circle: So 6 people are left over to go in the section that is blank. 6 people have seen Band Z and Band X, we can now fill this in on our Venn diagram.
You may be asked to solve problems ... Z's circle: So 6 people are left over to go in the section that is blank. 6 people have seen Band Z and Band X, we can now fill this in on our Venn diagram.