If I get 170 marks in advance, how much rank i can expect
I secured a Rank of 4.7k in JEE Advanced 2019, with a Score of around 158/372. Hence Considering a Moderate to Tough Paper like 2018, 2019 or 2020, with a Score in Range 165-175, depending on toughness of Paper, you have fair chances of securing a Rank anywhere around 4k (3-5k) in JEE Advanced. All the Best.
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