Question

In an examination, 75 percent passed in english, 90 percent passed in mathematics and 70 percent passed in both english and maths.if 40 students failed in both subjects, find the total number of students

Answer 1

Answer:

Total Students = 800

Step-by-step explanation:

Total Students = 100 %

Passed in English = E = 75%

Passed in Mathematics = M = 90 %

Passed in Both = E ∩ M = 70  %

Failed in Both = F  %

=> Total  = E + M  - E∩M + F

=> 100 = 75 + 90 - 70  + F

=> F = 5

5 % Failed in both

40 Students Failed in both Subject

5%  = 40

1 %  = 40/5 = 8

100 % = 100 * 8 = 800

Total Students = 800