In a survey taken of 60 households, 40 households reported having a dog and 30 households reported having a cat. If half of all households having a cat also have a dog, how many households reported have neither a dog nor a cat?
So, if 30 housholds have a cat 30/2 is 15. 15 housholds have a cat and a dog 30-15= 15 housholds have only cats 40-15=25 housholds only have dogs 25+15+15=55 60 housholds in total, so what is 60-55? <-- This will be your answer.
