can u help me I want blue print of past 3 years JEE mains exam

Hello Raj!!
I can provide you the link for previous years question papers with solutions and also the sample papers just go through it:

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-question-paper/amp?espv=1
https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-question-paper/amp?espv=1
Hope this helps you. Good luck!!

Hello.
as per your doubt I am providing you a link below where you can have all previous year question papers of JEE mains entrance exam simply by seeing a particular exam paper you can analyse the complete blueprint of that paper.
https://engineering.careers360.com/articles/jee-main-question-paper
Best of luck.