In a combine test of english and science , 7.5% failed in english , 22.5% failed in science and 5% failed in both. if 120 students passed in both the subjects then how many students appeared for the exam
Answers
Number of students failed in English = 7.5 % of 200 = 15 Students
Number of students failed in Science = 22.5 % of 200 = 45 students
Number of students failed in both subjects = 5 % of 200 = 10 students
Only failed in English = 15 - 10 = 5 students
Only failed in Science = 45 - 10 = 35 students
Total number of failed students = 5 + 35 + 10 = 50
So, the total passed students in both subjects = 200 - 50 = 150
Actual number of passed students in both subjects = 120 (Given)
So, if 150 students passed, the number of students appeared = 200
If 1 student is passed then the number of students appeared = 200/150
If,120 students actually passed then, the number of students actually appeared = (200 × 120)/150
⇒ 24000/150
= 160 students appeared in the examination. Answer.
Answer:
Step-by-step explanation:
Let the total students appeared = 200
Number of students failed in English = 7.5 % of 200 = 15 Students
Number of students failed in Science = 22.5 % of 200 = 45 students
Number of students failed in both subjects = 5 % of 200 = 10 students
Only failed in English = 15 - 10 = 5 students
Only failed in Science = 45 - 10 = 35 students
Total number of failed students = 5 + 35 + 10 = 50
So, the total passed students in both subjects = 200 - 50 = 150
Actual number of passed students in both subjects = 120 (Given)
So, if 150 students passed, the number of students appeared = 200
If 1 student is passed then the number of students appeared = 200/150
If,120 students actually passed then, the number of students actually appeared = (200 × 120)/150
⇒ 24000/150
= 160 students appeared in the examination.