dear aspirant,

it is difficult to predict the marks actually it is based on exam paper pattern and entries of students for exam, so try to score maximum marks to get seat in IIT

All the best..

JEE Advanced maximum marks are not defined :

Maximum Marks vary every year like below:

2016- 372
2015 - 504
2014 - 360

So, it is difficult to predict marks as exam pattern and marks change every year but you should score more than 30% marks to get good branch in Top IITs