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MathMentor

Learn with Mentor · 7 min

Solving Problems with Venn Diagrams

Learn to find the 'neither' group in an overlapping-categories problem by adding the two totals, subtracting the overlap, then subtracting from the whole.

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Counting overlapping groups

If some people like tea, some like coffee, and some like both, adding the two totals straight up double-counts the people who like both. A Venn diagram — two overlapping circles — helps sort this out.