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At my office, 16 people own cats, 9 people own dogs, and  $8$ people own both cats and dogs. How many people own a cat or a dog?

(Remember that in mathematics, the word "or" is used in the inclusive sense. So if you own both a cat and a dog, then you are included in the category of people "who own a cat or a dog".)

 Oct 31, 2021
 #1
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Hint:

 

Fill this out.  Start with the overlapping bit

 

 Oct 31, 2021

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