If this is regarding Assam CEE, according to the eligibility criteria https://engineering.careers360.com/articles/assam-cee-eligibility-criteria , you should have passed your 12th or equivalent examination individually in Physics, Chemistry, Mathematics and English without any grace marks. You should have appeared for all subjects in the examinations. And a Candidate belonging to General Category should secure a minimum aggregate of 50% in Physics, Chemistry and Mathematics. It is 45% for SC Category and 40% for ST Category. Now in your case, it is not clear whether 33 marks can be considered pass. If yes, then you are eligible for CEE provided you are not less than 17 years as on August 1st 2020 and you are not above 21 years.