Hi Shrijal, generally for the shortlisting process, most of mBA colleges, would have set some marks for academics as well. If you have a score of above 90% in 10th you get the full 10/10 points they give, and the trend slowly decreases like above 80% it is 8/10 and so on. It will attach a link below which gives a clear description of how the weightage is given to the marks obtained in 10/12th and UG. But it is not all that counts. Generally Ahmedabad gives less weightage to academics, and there are also various factors like CAT scores, work experience, GD-PI-WAT scores which are also given weightage and taken into consideration. So if all the other factors are dealt well and good, average academic scores wont even make a factor to rule you out. Please refer to this link, to understand the weightage given to academics. 

https://bschool.careers360.com/articles/iim-ahmedabad-admission-criteria