Kalyani R.

# An investigator interviewed 100 students to determine their preferences for the three drinks milk coffee and tea. He reported the following.

An investigator interviewed 100 students to determine their preferences for the three drinks milk coffee and tea. He reported the following,  10 students had all the three drinks, 20 had milk and coffee,  30 had coffee and tea , 25 had milk and tea,  12 had milk only. 5 had coffee only, 8 had tea only.  The number of students that did not take any of the three drinks is.

Kenneth S.

Use a Venn diagram! Fill in the several distinctly bounded areas in which three circles (C, T, M) overlap, partially, starting with innermost region (containing # who drank all three). When completed, the total of all 7 parts within any circle will be something < 100. That will tell you how many, out of the 100 surveyed, drink none of C, T or M.
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01/05/17

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