Question
'P', 'Q', and 'R' appeared in an exam. 'P' scored 60%
marks in an exam which was 90 more than passing marks. Whereas 'Q' scored 50% marks in the exam which was 20 marks less than the passing marks. If 'R' scored 85% marks in the exam, then find the difference between marks scored by 'P' and 'R' in the exam.Solution
ATQ, Let the total marks be 'U'. So, (60% of U) - 90 = (50% of U) + 20 Or, 0.6U - 90 = 0.5U + 20 Or, 0.1U = 110 So, U = 1100 Required difference = (0.85 - 0.6) × 1100 = 275
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