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5. (10 pts) A survey of 100 people, 53 of them played tennis and 48 of them swam. If 20 of them participated in both

5. (10 pts) A survey of 100 people, 53 of them played tennis and 48 of them swam. If 20 of them participated in both activities, how many of them participated in neither? Illustrate using a Venn diagram

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