Question

In an examination, 80% of the students passed in English, 85% in Mathematics and 75% in both English and Mathematics. If 40 students failed in both the subject, find the total number of students.

Answer 1

400 students in total
Because
80%+85%-75%=90%
10% students are failed in exam
10%=40
1%=4
100%=400
400students are in total