According to the CBSE guidelines, the passing marks for class 10 and 12 board exams are a minimum of 33% marks in theory exams, practicals, and internal assessment. To pass the CBSE class 10 exam, a student needs to score at least 26 marks out of 80. The passing marks for CBSE class 11 out of 35 are 12. However, the passing marks out of 30 in CBSE are not mentioned in the search results.