SOLUTION: A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 31 people who owned trucks and 62 people who owned car

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Question 293315: A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 31 people who owned trucks and 62 people who owned cars. If 22 people owned both a truck and a car and 9 people owned neither, how many people were interviewed?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
This is a case for a Venn diagram.
31-22=9
62-22=40
9+22+40+9=80 people interviewed.