Homework Help: statistics

Posted by kenneth on Wednesday, October 5, 2011 at 1:27am.

in a class of 40 student,18 pass maths, 19 pass account,16 pass economics 5 pass maths and account only, 6 pass maths only, if each student pass at least one of the subject.find the percentage number who fail in at least one of economics and maths. how many student fail in all the three subject.calculate the probability that a student selected at random fail in account

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