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T O P I C    R E V I E W
gurly691 Posted - 07/09/2011 : 12:23:52
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 59 people who owned cars. If 19 people owned both a truck and a car and 7 people owned neither, how many people were interviewed?
2   L A T E S T    R E P L I E S    (Newest First)
Subhotosh Khan Posted - 07/12/2011 : 12:04:08
quote:
Originally posted by gurly691

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 59 people who owned cars. If 19 people owned both a truck and a car and 7 people owned neither, how many people were interviewed?



You should draw a Venn diagram - and the answers will fall out.
Ultraglide Posted - 07/10/2011 : 12:33:24
Just think about the problem. If 19 people owned both a truck and a car, then those 19 are included in both groups so they are counted twice.

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