Answers

2015-09-24T20:05:48+05:30
Passed in English = 80%
Failed in English(E) = 100 - 80 = 20%
Passed in Mathematics(M) = 85%
Failed in Mathematics(M) = 100 - 85 = 15%
passed in both = 75%
failed in atleast one subject(M U E) = 100 - 75 = 25%

Failed in both (MΠE) =(E + M) - (M U E) = 20 + 15 - 25 = 10%
So total failed =10%
total appeared = 430 students
total failed = 10% of 430 = 430×10/100 = 43 students

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