Question

in a examination 60% pass in english,70 %pass in maths but 20% failed in both and 2500 pass in both then how many students aapear in exam?​

Answer 1

Answer:

5000

Step-by-step explanation:

% of students who failed in English = 100 - 60 = 40%.

% of students who failed in Maths = 100 - 70 = 30%.

% of students who failed in both = 20%.

% of total number of students who appeared = 40+30 - 20 = 50%.

50% of total students = 2500

Total students appeared = 2500*100/50 = 5000.