Hey there
It totally depends on your branch like for electrical engineering for admissions into IITs minimum rank should be around 1400-1500 for mtech after then chances are very less. The data is almost same for mechanical engineering students also but not for CSE, IT etc.
Check the link
https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/gate-cutoff-for-iits/amp&ved=2ahUKEwjU24eC7r3pAhXIT30KHclCBl4QFjAAegQIAxAB&usg=AOvVaw1CCw3xBF71Vm87Ja5f4b5q&cf=1
Good luck
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