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.
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