Question

43. 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.
(a) 400
(b) 450
(c) 500
(d) 600​

Answer 1

Answer:

80+85–75=90%of students passed in total

100–90= 10% of students failed in total

10%=45 students

100%=450 students