Hello,

You can only get a seat in IIT Bombay or any other IIT on the basis of JEE Advanced performance(JEE Advanced rank). To be eligible to appear for JEE Advanced, one needs to qualify JEE Mains cutoffs. There is no management quota in any of the IITs or NITs.

Kindly predict your college in this college predictor. JEE Main rank predictor is an online tool which predicts the candidates rank range and probable colleges based on the difficulty level of the examination, average marks scored in JEE Main and seats available in IITs, NITs, GFTIs, and other SFTIs. The rank predicted might not be accurate but it certainly does give an idea to the aspirant. Know your college admission chances based on your JEE Main Rank, Home State, Caste, Gender, etc

https://engineering.careers360.com/jee-main-college-predictor?icn=JEE_Main_clgpd&ici=JEE_Main_article_contmap