* Your school's grading system: Each school or institution uses a different system. Some use letter grades (A, B, C, D, F), some use numerical scores (e.g., 0-100%), and some use a combination. You need to know your school's specific passing grade. A "C" might be passing at one school, while a "D" might be at another. Similarly, a numerical score of 70% might be passing, or it might be 60%, or something else entirely.
* Your teacher or professor's grading policies: Even within a school's overall grading system, individual teachers might have specific requirements for passing their courses. They might offer extra credit opportunities or weight certain assignments more heavily.
* Your course syllabus: This document, given to you at the beginning of the course, outlines the grading criteria, including the passing grade. Check this carefully!
* Your official grade report: After the grading period ends, your school will typically provide you with an official report card or transcript that clearly indicates whether you passed or failed each course.
In short: You need to consult your syllabus, teacher/professor, and/or official grade report to definitively determine if you passed a grade. There's no universal answer.