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OpenStudy (anonymous):
in a group of 60 students, 18 students take Algebra 1, 20 students take Algebra 2, and 10 students take both subjects. How many students don't take either of these subjects?
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OpenStudy (aripotta):
60 - 18 - 20 - 10
jimthompson5910 (jim_thompson5910):
|dw:1418342359834:dw|
jimthompson5910 (jim_thompson5910):
10 take both, so this goes in the very center in the overlapping region |dw:1418342417567:dw|
jimthompson5910 (jim_thompson5910):
"18 students take Algebra 1" and "10 students take both subjects" so 18-10 = 8 students take algebra 1 only |dw:1418342450662:dw|
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