If you are appearing for a board improvement exam , the total marks you will write for each subject will depend on the board's specific guidelines . Here's how it generally works for most boards:

CBSE (Central Board of Secondary Education) Improvement Exam:

• For theory subjects , you will write the exam for the full 100 marks (or the full marks for that subject as specified).
  
  
• This includes the 80 marks theory paper and the 20 marks internal assessment that you already completed during your regular school year. Your internal assessment marks will usually be carried forward.
  
  Other State Boards:

Most other boards follow a similar approach. If your board has a division of marks between internal assessments (like practicals, projects) and theory exams, you will write only the theory portion (80 marks or whatever the subject's theory component is worth).

Practical Subjects:

For subjects involving practicals , your practical marks are usually carried forward from your previous attempt, and you will only write the theory portion.

Conclusion:

• You will write the full theory exam (typically 80 marks if the total theory marks are 80) in improvement exams.
  
  
• Internal marks or practical marks from your previous exam attempt are generally carried forward.

Make sure to check your board's official guidelines for the most accurate information.