SOLUTION: In an examination at KIPS where there were 500 students 80% students is passed in English and 30% passed in chemistry. How many studenys passed in both the subjects?

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Question 1065499: In an examination at KIPS where there were 500 students 80% students is passed in English and 30% passed in chemistry. How many studenys passed in both the subjects?
Answer by ikleyn(52847) About Me  (Show Source):
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In an examination at KIPS where there were 500 students 80% students is passed in English and 30% passed in chemistry.
How many studenys passed in both the subjects?
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80% of 500 is 400.

30% of 500 is 150.


The number of students under the question is 400 + 150 - 500 = 50.

If you want to know "why", read this lesson
    - Counting elements in sub-sets of a given finite set
in this site.


Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Miscellaneous word problems".


If you have questions or want to say "thanks", then please mention the ID number of this problem (# 1065499) in your response.