# Algebra

A poll was taken of 100 students on how they got to campus. 33 drove alone, 35 rode in a carpool, 26 rode public transportation, 6 used both carpool and public transportation, 8 used both a carpool, 6 used buses as well as their own cars, 5 used all three methoda. How many are not using any of the treee?

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1. assuming all you need is confirmation of the answer you obtained through your hard work,

21

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