Hello! Hope you are doing good

Admissions to IITs is done on gate score and not marks you have scored. So, the result is highly unpredictable where thebhighesg and lowest marks are the deciding factor of the test.

Till the orevious years, a score of 70 would be considered good to get a seat in the IITs. Since, you have a reservation, you're in a beneficial state. The chances of your getting into IIT is good. But then again, we cannot rely on the previous years data as anything can change at the last moment.

All the best