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In academic settings, whether you pass a subject based on your performance on an exam can depend on several factors, including:

1. Total Marks Required: Most colleges and universities have a specific passing mark or percentage required to pass a course. For example, if the passing mark is 35 or 40 out of 100, scoring 25 may not be enough.

2. Grading System: Some institutions have a grading system where the overall performance across multiple assessments (like quizzes, assignments, and exams) is considered. If your other grades are strong, it might help your overall average.

3. Re-evaluation or Re-checking: If you believe there has been an error in marking or you are very close to the passing mark, many institutions offer a re-evaluation or re-checking process. You can inquire about this option with your institution.

4. Supplementary Exams: If you do not pass, some colleges allow students to take supplementary or re-exams in subjects they did not pass initially.

5. Policies on Marginal Passing: Some colleges have policies where students who score just below the passing mark may be given a passing grade if their overall performance is strong enough or if they meet certain criteria.

Recommendations:

• Check Your College's Policy: Look into your institution's grading policy or handbook for specifics on passing marks, re-evaluation processes, and supplementary exams.
• Talk to Your Teacher/Professor: If you have concerns about your performance, consider discussing it with your instructor. They may provide insights on your chances of passing or options for improving your grade.