Question

20. In an examination, 60% of the students passed in English, 80% in Mathematics and 65% in both
English and Mathematics. If 70 students failed in both the subjects, find the total number of
students.
280
670
677
288​

Answer 1

Answer:

Step-by-step explanation:

P(E) = 60%

P(M) = 80%

P(EnM) = 65%

Total Passed Students P(EuM) = P(E) + P(M) - P(EnM) = 60 + 80 - 65 = 75%

Total Failed students in both subjects = 100% - 75% = 25%.

Let the total number of students be x.

25% of x = 70

=> x = 70 * 100 / 25 = 280.