Question 978409: in a group of students 50 passed in english 60 passed in maths and 40 passed in both the exams.find the no.of students who passed either in english or in maths.
Answer by addingup(3677)   (Show Source):
You can put this solution on YOUR website! I'm not sure I understand the question as written.
50 students passed English
60 students passed math
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100 students passed English OR math. However:
50 students passed English
40 students passed English (they also passed math)
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90 students passed English. And,
60 students passed math
40 students passed math (they also passed English)
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100 students passed math
...........
So, to your question:
90 students passed English and 100 students passed math. HOWEVER:
50 students passed English only and 60 students passed math only.
We are not double counting, the total number of students is still 50+60+40=150, it's just that we are dealing with two subjects, English and math.
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