Question

In an examination 30% students failed in English,25% students failed in maths and 5% Students failed in both the subjects. If 220
Students passed,then how many student failed in only english

Answer 1

Answer:

In an exam 30% students fail in English 25 % fail in maths and 5% students fail in both subject

Let there be 100 students appeared in examination

30% failed in English = 30/100 × 100 = 30 students

This include the students who failed in both Mathematics and English. So student failed only in English

30 - 5 = 25 students

25% failed in Mathematics = 25/100 × 100 = 25 students

This include the students who failed in both Mathematics and English. So student failed in mathematics are

25 - 5 = 20 students

5% failed in both Mathematics and English = 5/100 × 100 = 5 students

Total number of student

Answer 2

Answer:

40%of x =220

x=22000÷40

x=550

3×55

= 165 failed in english