If a student scores 30% marks then he is failed by 50 marks, but when he scores 50% marks then he is passed by 30 marks. Find the passing %?
Let the Total marks be x According to the question, 30% of x + 50 = 50% of x -30 30x/100 + 50 = 50x/100 - 30 20x/100 = 80 x = 400 Passing marks = 30% of 400 + 50 = 120 + 50 = 170 Passing Percentage = (170/400)× 100 = 42.5%
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