In an exam every question correctly answered fetches 2 marks. Every question wrongly answered loses 1 marks. unanswered question have no marks associated with them. ram and shyam wrote this exam. ram attempted a certain number of questions and 30 % of them went wrong. shayam attempted a certain number of questions anf 40% of them went wrong. ram got 40 marks more than the pass mark. shyam got 25 marks more than the pass mark. the two of them together attempted a total of 100 questions.
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so, what is the pass mark?
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