Hi Ankush!

You have actually got 74% with the subject combination of Physics, Chemistry and Maths. Thus according to the class 12 subject combination criteria, which suggests including PCM for calculating percentage, you will not get admission in IIT and NIT. But never mind you will get admission in private colleges. You can also know about your rank in JEE MAIN by using this:- JEE Main Rank Predictor - Predict your JEE Main 2019 Rank - JEE Main Percentile Calculator

I hope it helps. Good luck!