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If there are 20 people in a room. 10 of them are studying math. 10 people are studying science. How many people are studying both math and science, if one person is studying neither math nor science
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If there are 20 people in a room. 10 of them are studying math. 10 people are studying science. How many people are studying both math and science, if one person is studying neither math nor science

User Glenn Sonna
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if there is a total of 20, subtract the 1 person doing neither which would be 19
User Chaohuang
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