Class 12 below 60% are matter in final placement if i get admission in top b school ??????
During Final placement also many of the companies look for your past academic records but the number of companies doing that is fewer than internship placements. At the time of final placements companies majorly concentrate on your previous work experience and internship. But still, your 12th percentage matters significantly in your CV shortlisting for the second round.
All the best!!
Also you will get call from FMS if you have applied for it. So overall you will have a good chance of converting your call and getting an admission in a good IIM.
You cannot change your 12th percentage and whatever gonna happen in future because of it. ONLY THING YOU CAN DO IS REDUCE THAT LOSS AND THAT CAN BE DONE BY GETTING IN A BEST IIM.
In the best IIM even if you get placed a little late than your batchmates then also you will end up in a much better company than your colleagues studying in an IIM lower in ranking than your college.
So stop worrying about it and PREPARE VERY HARD FOR YOUR WSAT AND INTERVIEW. Give your best so as to get admission in best college. That's all.you can do now.
Usually for final placements they refer to the candidate complete profile and CV, so if you have a good CV there are high chances of shortlisting in a good number of companies.