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QIn a small high school of 20 students, 6 students are taking algebra, 8 are taking geometry and 3 are taking both

In a small high school of 20 students, 6 students are taking algebra, 8 are taking geometry and 3 are taking both. How many students are not taking either?

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#1NehemiahAnswered at 2013-01-18 19:48:19
"6 students are taking algebra", but 3 of those are taking both so 3 are taking just algebra "8 are taking geometry", but 3 of those are taking both so 5 are taking just geometry 3 - both 3 - just algebra 5 - just geometry 11 students taking algebra/geometry ___ 9 students (20-11) not taking either
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In a small high school of 20 students, 6 students are taking algebra, 8 are taking geometry and 3 are taking both

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