Mathematics · Percentages and Linear Equations

Priya scored (3a + 15) marks in a Chemistry exam and failed by 20 marks, while Rohan scored (5.3a - 12) marks in the same exam and obtained 22 marks more than the passing marks. If the passing percentage is 25%, the maximum marks for the Chemistry exam is N. If the maximum marks for Biology is (N + 60) and Seema fails in Biology by 15 marks after scoring 45% marks, what are the passing marks in Biology?

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