Explanation:

- The student scores 225 marks but is declared to have failed by 10%.

- This means the student's score (225) is 90% of the pass marks (300).

- To find the maximum marks, consider 225 marks is 90% of what is needed to pass.

- If 225 marks are 90% of 300, that means 300 is what the student should have scored to pass.

- 300 marks make up what percentage of the total maximum marks?

- If passing marks are 300, that represents a 40% pass threshold. Therefore, maximum marks are \( \frac{300}{0.4} = 750 \).

- Answer is option 2: 750