Hi Mohammed,below is the eligibility criteria(with respect to marks) for CEE :

The candidates are required to score aggregate 50% collectively in Physics, Chemistry and Mathematics. SC candidates will have to secure 45% marks while ST candidates will have to score 40% marks. 

For more details about CEE exam,you can refer the link given below.

https://engineering.careers360.com/articles/assam-cee-eligibility-criteria

Good luck!

• The candidate must have passed 10+2 exam in one sitting without any grace marks with physics, chemistry, mathematics and English as compulsory subjects.
• The candidate must score minimum 50% aggregate marks in physics, chemistry and mathematics. The minimum aggregate marks for SC and ST candidates are 45% and 40% respectively.