many educational institutions, particularly in India, students in class 12 are required to maintain a minimum attendance percentage to be eligible for examinations.

Try to have atleast 75 percent in a year if your school has this condition too because n the end even if you have low attendance you will not allowed to sit in the exams.for example your overall attendance of just 62% you may face difficulties.

Private candidates are not eligible for top institute in india regular students has more value than private ones.