Mathematics, 23.08.2021 17:20 jadenyankey

2. In a class of 80 students in Debreberhan University, 45 are good in mathematics, 15 are good in both mathematics and in English, 13 are good in both mathematics and psychology, 16 are good in both English and psychology only, 20 are good in psychology and 9 are good in both of the three course 2pts, each 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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