Hello aspirant, to get computer science in iit Bombay in OBC category, your rank should be around

1. For Male ... 7 to 35

2. For female 59 to 122

So minimum Mark's to secure seat is 115. That too for computer science, you need to score 140 a bare minimum. In terms of percentage, it should be 89 at least

Hope this helps

Regards

Nikhitha