The passing marks of 30 could refer to different contexts, such as the minimum marks required to pass an exam or the minimum score required to pass a certain section of an exam. Here are some examples of how the passing marks of 30 are used in different contexts:

• In a table provided in a Testbook article, the passing mark is 30 and the question asks for the number of failures in both sections A and B together who scored less than 30 marks. The solution to this question is that the number of failure students from section A and B together who scored less than 30 marks is 35.

• In another Testbook article, the passing marks are 30% and the question asks for the percentage by which Mahir failed if the total marks are 600 and Pooja scored 65%. The solution to this question is that Mahir failed by 3% .

• In a BYJUS article, the passing marks are 30 and the question asks for the number of students who failed in a mathematics exam represented by a histogram. However, the answer to this question is not provided in the article.

• In a Nation Hub article, the passing marks are discussed in the context of CBSE board exams for classes 10 and 12. The minimum pass marks out of 80 are 26 marks, which means that students need to achieve at least 33% marks to pass the exam. However, the article also provides passing marks out of other total marks, such as 70, 40, and 30.

Therefore, the passing marks of 30 could mean different things depending on the context.