No, you won't get a call from IIM Shillong with 50 percentile even if you are an SC student. IIM Shillong which is considered as one of the old IIMs after IIM A, B, C, L, K and I is also a premier institute and for getting a call you must need to have atleast 75+ percentile with an overall good profile (10th, 1th and graduation percentage, work experience, engineer or non-engineer etc.) for getting a call. Every parameter has a different weightage in different colleges.

I am sorry to say that with 50 percentile it will be even very tough for you to get a call from any new IIM. You need to look out for other colleges or give other MBA exams in order to perform much better than this time.

All the best!!