Hey

why do you need this answer?

do you wnat to conduct a survey of teh median scores of CBSE or do you want to check whether your score aligns with teh rest of teh nation or not 

As far as IIT is concerned, they will accept any score above 75% or 80% as they accept the top 20 percentile

hope it helps!!

Hello Aman,

Can you please tell me for which course/college you are asking this, so that i can provide you with the detailed information. Thank you for contacting us. 

All the very best!