Math Problem Statement
Venn diagram question- 18 liked pizza, 10 liked burgers, 10 liked sushi, 7 liked burgers and pizza, 5 liked burgers and sushi, 2 liked pizza and sushi, and 3 liked all three. How many people like exactly two types of food?
Solution
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Math Problem Analysis
Mathematical Concepts
Set Theory
Venn Diagrams
Inclusion-Exclusion Principle
Formulas
People who like exactly two types of food = (A ∩ B) - (A ∩ B ∩ C)
Inclusion-Exclusion Principle: |A ∪ B ∪ C| = |A| + |B| + |C| - |A ∩ B| - |A ∩ C| - |B ∩ C| + |A ∩ B ∩ C|
Theorems
Inclusion-Exclusion Principle
Suitable Grade Level
Grades 7-10
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