How Many Student Fails in Both Subject? If

In an examination, 19% students fail in Mathematics and 10% students fail in English . If 7% of all students fail in both subjects, then the number of students passed in both subjects is

  1. 36% of all students
  2. 64% of all students
  3. 71% of all students
  4. 78% of all students
Manish Listener Asked on 9th July 2015 in Maths.
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1 Answer(s)

Answer : (4) 78% of all students

The total percentage of students appeared in Examination = 100%

The percentage of students fail in Mathematics = 19%,

Percentage of students fail in English = 10%,

and percentage of students fail in both subjects = 7%.

Now, we have to find number of students passed in both subjects;

Total percentage of fail students in examination = 12% fail in only mathematics + 3% fail in English only + 7% fail in both subjects
= 22% students are failed in examination.

Percentage of students passed in the examination = total percent of students appeared in exam – total percent of students failed in examination
= 100% – 22%
= 78%

Hence, the number of students passed in both subjects is 78%.

vijay Professor Answered on 13th July 2015.
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