IIT Bombay is the most coveted and anticipated school and draws alot of interest amongst students, however the cutoff varies for all the branches as mentioned in below link as per 2017 results.

https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-bombay

the least rank to get into IIt BOMBAY was 3039, which corresponds to roughly 235-240.

The lowest ranks are admitted into branches like metallurgy and aerospace engineering. However, both are phenomenal and has seen great placements with an average salary of 7.5LPA with companies like Vednata, Schlumberger, hindalco, ISRO,DRDO, HAL, coming to campus.