document.write( "Question 1121832: Of the 29 vendors at a farmers' market, there are 6 that sell carrots and 13 that sell tomatoes. If 3 of the vendors sell both carrots and tomatoes, how many of them sell neither carrots nor tomatoes?
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Algebra.Com's Answer #737840 by ikleyn(52788)\"\" \"About 
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document.write( "The number of vendors who sell EITHER carrots OR tomatoes is  6 + 13 - 3 = 16.\r\n" );
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document.write( "    I subtracted 3 from the sum of 6 + 13, because those who cell both carrots and tomatoes were counted twice in this sum.\r\n" );
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document.write( "Hence,  the number of vendors who sell NEITHER carrots NOR tomatoes is  29 - 16 = 13.\r\n" );
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