HI, It also depends on your branch preference.
As there is not total marks in Jee Advance and it keeps on changing every year.
For IITs, it's difficult to predict marks as JEE Advanced exam 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 50% marks to get good branch in Top IITs
Good Luck.

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