Question 395086: A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 34 people who owned trucks and 54 people who owned cars. If 12 people owned both a truck and a car and 8 people owned neither, how many people were interviewed?
Answer by jrfrunner(365)   (Show Source):
You can put this solution on YOUR website! let T = number truck owners
let C=number of car owners
let B=number who own both
let N=number who own neither
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given T=34, C=54, B=12, N=8
Total interviewed =34+54-12+8=84
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subtract B=12 because in counting T and C the B is counted twice.
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