This question is very general and it is not possible to give exact answer as it depends on different classes, subjects and boards . For each class and subject, the syllabus and marks distribution is different. You need to refer to the syllabus and exam pattern for your specific class and subject.

For example, if you are talking about CBSE Class 10, the Mathematics paper will have theory exam of 80 marks and internal assessment of 20 marks. At the same time, there are practical exams in some subjects like science, which has 70 marks for theory and 30 marks for practical.

You can ask again with details required to answer.