Question

in Class of 80 students in debrebirhan university, 45 are good in mathematics, 15 are good in both mathematics and English, 13 are good in both mathematics and psychology, 16 are good in both English and psychology only, 20 are good in psychology and 9are in both of the three courses ​

Answer 1

no. of people good at English only=24

Step-by-step explanation:

The explanation is in the attached image. I hope it is helpful.