SOLUTION: At my office, $18$ people own cats, $27$ people own dogs, and $14$ people own both cats and dogs. How many people own a cat or a dog?

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Question 1207607: At my office, $18$ people own cats, $27$ people own dogs, and $14$ people own both cats and dogs. How many people own a cat or a dog?
Answer by ikleyn(52771) About Me  (Show Source):
You can put this solution on YOUR website!
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At my office, 18 people own cats, 27 people own dogs, and 14 people own both cats and dogs.
How many people own a cat or a dog?
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The number of people that own a cat or a dog is 

    18 + 27 - 14 = 31.     ANSWER


The general formula is

    N(own a cat or own a dog) = N(own a cat) + N(own a dog) - N(own a cat and a dog).

Solved.