* The specific subject: Different subjects have different grading scales. A C in one subject might require a higher raw mark than a C in another.
* The exam board: Each exam board (like Cambridge Assessment International Education, Edexcel, etc.) sets its own grade boundaries. These boundaries change from year to year depending on the difficulty of the papers.
* The specific exam paper: Even within a subject, the grade boundaries can vary slightly between different papers (e.g., Paper 1 vs. Paper 2).
To find out the required marks, you need to:
1. Identify the exam board: Know which board administered your IGCSE exams (e.g., Cambridge IGCSE, Edexcel IGCSE).
2. Identify the specific subject: The grade boundaries are subject-specific.
3. Check the exam board's website: The exam board's website will publish the grade boundaries after each exam series. These are usually available a few weeks after the exams are completed.
In short, you can't determine the required mark without knowing these specifics. Contact your school or the exam board directly for the most accurate information.