* It's usually set by individual schools. Schools often have their own internal regulations specifying a minimum attendance percentage (often around 75%), and students who fall below this threshold may be barred from taking the exams.
* There's no fixed CBSE rule. While the CBSE recommends a high level of attendance, they don't enforce a specific percentage at the board level. The responsibility largely falls on the individual schools.
Therefore, you must check with your school to find out their specific attendance requirements for appearing in the CBSE board exams.