Question
'J', 'K', and 'L' appeared in an exam. 'J' scored 50%
marks in an exam which was 70 more than passing marks. Whereas 'K' scored 40% marks in the exam which was 30 marks less than the passing marks. If 'L' scored 75% marks in the exam, then find the difference between marks scored by 'J' and 'L' in the exam.Solution
ATQ, Let the total marks be 'W'. So, (50% of W) - 70 = (40% of W) + 30 Or, 0.5W - 70 = 0.4W + 30 Or, 0.1W = 100 So, W = 1000 Required difference = (0.75 - 0.5) × 1000 = 250
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