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Mathematics 12 Online
OpenStudy (bquiz):

"In a class, 22 students take one or more of chemistry, economics and government. 12 take economics (E), 8 take government (G) and 7 take chemistry (C). Nobody takes economics and chemistry, and 4 student takes economics and government" [a] how many student takes both chemistry and government [b] how many take government only. (please help me solve)

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