Question
In a school, 60% of the students are boys, while the
remaining 40% are girls. If 70% of the boys and 80% of the girls pass an exam, what percentage of the total students fail the exam?Solution
Let the total number of students be 100.  Number of boys = 60, Number of girls = 40.  Boys who fail = 18, Girls who fail = 8.  Total students who fail = 26.  Percentage of students who fail = 26%.  The percentage of students who fail is 26%.
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