Hey.
Various colleges providing the course of 3 year LLB have an eligibity criteria which requires you to score a minimum aggregate of atleast 45-55% marks in your graduation degree which varies in each University. As the results of various college and universities are not out till  the time of counselling, you are offered admission provisionally subject to you scoring the minimum required percentage. So you can carry all the other documents with you. And you can submit the final marksheet after the result is out. But some colleges have a specified date till which the marks can be submitted. You will have to check with that respective college for details regarding the same