Math Problem Statement
In a school there are 20 teachers who teach mathematics or physics. Of these, 12 teach mathematics and 4 teach physics and mathematics. How many teach physics?
Solution
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Math Problem Analysis
Mathematical Concepts
Set Theory
Basic Arithmetic
Formulas
Number of teachers who teach only mathematics = Total math teachers - Teachers who teach both subjects
Total teachers = Only physics teachers + Only mathematics teachers + Teachers who teach both
Theorems
Principle of Inclusion-Exclusion
Suitable Grade Level
Grades 6-8
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