Marks cannot be predicted as the difficulty of paper
changes every year,  number of students appearing for the exam also changes every year and there are many factors which we need to note.
But if you are very sure that you want admission in Indian Institute of Space Science and Technology then you must acquire rank above 300s.  This is just an estimate try to score more than this.
There are only 60 seats available for both B. Tech in Aerospace Engineering and B. Tech in Electronics and Communication Engineering (with specialization in Avionics) in Indian Institute of Space Science and Technology . Since there are only 60 seats, you must achieve as high rank as possible in JEE Advance to acquire admission in this Institute.
For Masters in Science there are only 20 seats. So prepare yourselves according to it.
Remember any student with the help of determination can achieve high rank.
If you still have any queries feel free to ask in the comment section down below .

Dear,

I think if you get a average rank in Advance, I think you will surely get IIST.

Because of

• Many students who get admissions in top IITs, do not fill forms for IIST
• Some people who get ranks in Advance (but not good enough) wait for the next year so that they can go for IITs.
• One of my friend who was not getting B.Tech in any IIT because of his rank, got admission in IIST.

I think it's helpful for you

Thanks 

Marks cant be said but your rank should be less than 4000 in jee advanced to get into iist.

you can refer previous year cutoffs from career360 website to get a clear picture.

all the best

Hello,


You can follow the link.bekow where you will find the cutoff marks for admission in IIST.

https://engineering.careers360.com/articles/iist-btech-cutoff

Goodluck

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