With the score of 120 out of 300 in JEE Main, on a medium difficulty paper, you can expect a percentile between 97 and 98. With this percentile, you can expect your to be around 22000-33000.

However, you will get a much better prediction once question papers for all the slots are released by NTA.

Hi,

I guess you asking 'what will be your percentile score for jee main if you score 120 marks '

If you score 120 marks in jee main 2020 then for the general category your expected percentile will be

in between 97.49 - 97.69 Your expected General Rank will be in between 21171 - 25321.

Hope it helps.