Sir I'm an average student and i want to get admission in IIM Ahmedabad. But i dont have good enough marks in my 10th & 12th. I got 70% in 10th & 76% in 12th. So sir is it possible for me to get admission in IIMA even after getting good percentile for my CAT entrance test.

Dear candidate, I know you might have doubts about how would the college react knowing your previous papers and their results but, you must know no that there is no influence of your 10th or 12th marksheets in front of the college interviewers.
The admission into IIM Ahmedabad is itself a great victory and let me inform you that there is nothing like the involvement of previous exams, even the students of Engineering undergraduates go for MBA programs in various colleges. So coming to the point, I would like to suggest you that forgetting about your previous marks, which are not much bad, you must focus on the CAT examination because you can get Ahmedabad only if you are under 99 percentile student and yes it's quite difficult to achieve but if you try to work on the the portion of examination then obviously in one year or two you can crack CAT.

Also after cracking the CAT examination it's the interview part which makes sure that you will get admission in IIM Ahmedabad because the interview part is quite tough you need to be rebuilt your personality your speaking skills which are very much simpler important for any candidate who is appearing for the cat interview examination. I hope you understand what my concern is about. All the best!!!