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In an examination, 50% of the students passed in Science and 75% passed in Social, while 20% students failed in both the subjects. If 270 students passed in both subjects, find the total number of students who appeared in the exam?
- a)400
- b)540
- c)600
- d)750
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In an examination, 50% of the students passed in Science and 75% passe...
Answer – 3.600 Explanation : passed in science = 50% passed in social = 75% 20% students failed in both the subjects and 80% passed in at least one subject No of students passed in both subjects = 50+75−x=80 x=45% 45% of x = 270 x = 270*100/45 = 600
Total number of students =600
Total number of students =600
This question is part of UPSC exam. View all Quant courses
Most Upvoted Answer
In an examination, 50% of the students passed in Science and 75% passe...
Option b since 50% passed in both equals 270 so by unitary method 100% will be 540
Community Answer
In an examination, 50% of the students passed in Science and 75% passe...
Answer – 3.600 Explanation : passed in science = 50% passed in social = 75% 20% students failed in both the subjects and 80% passed in at least one subject No of students passed in both subjects = 50+75−x=80 x=45% 45% of x = 270 x = 270*100/45 = 600
Total number of students =600
Total number of students =600
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In an examination, 50% of the students passed in Science and 75% passed in Social, while 20% students failed in both the subjects. If 270 students passed in both subjects, find the total number of students who appeared in the exam?a)400b)540c)600d)750e)None of theseCorrect answer is option 'C'. Can you explain this answer?
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