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Hello,
The cut off changes every year depending on various factors such as total number of candidates applied for the counselling, difficulty level of examination, top rank, merit and total number of seats available etc. Last year the cut off (IIST UG ADMISSION-RANK-2020) was as follows for admission to B.Tech. (Aerospace Engineering) in IIST
The JEE Advanced 2020 cut off marks was as follows
The total marks for JEE Advanced will change every year. The marks vs rank also varies every year. You have not mentioned your category assuming that you belong to general category you need to score minimum 29-34% of total marks in JEE Advanced in order to get seat in IIST in B.Tech (Aerospace Engineering).
To check the previous year cut off click on the link below
https://www.iist.ac.in/admissions/undergraduate
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