At my office, 16 people own cats, 11 people own dogs, and 7 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".)
+1693 At my office, 16 people own cats, 11 people own dogs, and 7 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".)
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There are 20 people who own cats and dogs.
(16 - 7) + (11 - 7) = 13
Soo, only 13 people own a cat or a dog.
7 people own both cats and dogs.
