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December 21, 2014

Homework Help: math

Posted by ray on Friday, May 31, 2013 at 11:15am.

A poll of 100 students was taken at a no-residential college to find out how they got to campus. The results were as follows: 28 said car pools;31 said buses;and 42 said they drove to school in their own car alone. In addition, 9 used both car pools and buses;10 said both car pools and using their own car; and 6 used buses and sometimes used their own car. Of the 100 respondents, only 4 used all three methods to get to school. Can you show me how to set up the problem and answer how many students used none of the three methods to get to school?

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