Mathematics, 23.08.2021 20:10 Wanna14ever

2. In a class of80 students in University, 45 are in mathematics, IS are good in both mathematics and in English, 13 are good in both mathematics and psychology, 16 are good in both English and psycholoo' only, 20 are good in psychology and 9 are good in of the three courses. 2pts. eaeb a) How many students are good in mathematics only? b) How many students are not good in any of the three course?

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