Question
'M', 'N', and 'O' appeared in an exam. 'M' scored 40%
marks in an exam which was 20 more than passing marks. Whereas 'N' scored 30% marks in the exam which was 10 marks less than the passing marks. If 'O' scored 65% marks in the exam, then find the difference between marks scored by 'M' and 'O' in the exam.Solution
ATQ, Let the total marks be 'V'. So, (40% of V) - 20 = (30% of V) + 10 Or, 0.4V - 20 = 0.3V + 10 Or, 0.1V = 30 So, V = 300 Required difference = (0.65 - 0.4) × 300 = 75
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