What are my chances of getting into FMS Delhi or any old IIMs? My academics are 10th/12th/under-grad: 87.3/78.6/75 CAT percentile is 99.78 percentile. Should I expect a call or try other things?

You have a high chance of receiving a call from IIM-L and C but negligible chances of receiving a call from the old IIMs, namely A, B, K, and I, given that you are a general engineering male with the academic scores and a 99.78 percentile in the CAT exam.

You should focus on the high chance of converting FMS Delhi, given your strong academic record and impressive CAT percentile.

Factors such as gender and academic background can also play a role in the admission process and the likelihood of receiving a call from certain institutions.