The pass marks vary depending on the examination. Typically, for most academic exams, the pass marks are set at around 33%. Therefore, in order to pass the academic exam in general, you would need to obtain at least 27 marks out of 80. However, it is important to note that this criteria may differ from institution to institution and from exam to exam. To ensure accuracy, it is advisable to review the rules and regulations of the specific examination.

Passing Criteria of CBSE- https://school.careers360.com/boards/cbse/cbse-passing-marks-for-class-10-and-12

Depending on the examination, the pass marks depends. Now in general for most academic exams the pass marks is around 30%. So you need to get 24 marks out of 80 marks in order to pass the academic exam in general. But this criteria may change from institution to institution and exam to exam. So you should see the rules and regulations of the examination in order to be sure about it.

I hope this answer helps. All the very best for your future endeavors!