document.write( "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? \n" ); document.write( "

Algebra.Com's Answer #845576 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "At my office, 18 people own cats, 27 people own dogs, and 14 people own both cats and dogs.
\n" ); document.write( "How many people own a cat or a dog?
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document.write( "The number of people that own a cat or a dog is \r\n" );
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document.write( "    18 + 27 - 14 = 31.     ANSWER\r\n" );
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document.write( "The general formula is\r\n" );
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document.write( "    N(own a cat or own a dog) = N(own a cat) + N(own a dog) - N(own a cat and a dog).\r\n" );
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