In a class of science students, 4 students like only physics, 7 like only chemistry, and 5 like only biology. If 10 students like both Biology and Chemistry, 5 students like Physics and Biology only, and 11 students like both Physics and Chemistry. How many students like the 3 courses if only 39 students out of the 50 students in the class like either of these subjects?
University of Ilorin MTH101 salang past question
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