Author 
Topic 

gurly691
Average Member
USA
10 Posts 
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? 


Ultraglide
Advanced Member
Canada
299 Posts 
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. 


Subhotosh Khan
Advanced Member
USA
9117 Posts 
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. 



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