Asked by unowen

In an examination, 40% students pass in Math, 45% pass in Science and 55% pass in English. 10% pass in Math and Science, 20% in Science and English and 15 % in English and Math. Find the percentage of students who passed in all the 3 subjects
Answered by bobpursley
Here is an example. Put it to paper, and see if it guides you to the answer.
https://www.youtube.com/watch?v=vKzhN57yuFc
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