Mathematics, 15.08.2021 14:00 barn01

in class of 80 student debre berhan 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 three courses. how many students are good in mathematics only ? how many students are not good in any of three courses ?

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in class of 80 student debre berhan university ,45 are good in mathematics,15 are good in both mathe...