JEE

Can you specify which institute exactly you are talking about, and also your rank and category because these things matter.

First of all, I would like to congratulate you for getting a good percentile. To predict colleges based on your rank, please go through this link:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=shiksha&utm_medium=email&utm_campaign=clientmailers

Hello Suriyabala, You have got a decent percentile and if you are belonging to backward classes then I hope you should get admission in one of the NIT's with this percentile. However to be sure I am attaching a link that will allow you to input your percentile figure for predicting as to which college you are likely to get. I would like to advise you here that if the predicted college is not to your liking then please do appear for JEE Mains which is being conducted by NTA in April also. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictorbest wishes to you.

Your Predicted Rank is 498180 JEE Main Percentile 43%, AIR, SC)
Above is the possible rank you can get. The final rank will be based on the best of the scores of JEE-Mains January 2019 and April 2019 exam. The predicted rank may vary due to JEE Main tie breaker rules for same score.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Kindly visit the above link for the list of eligible colleges.

Check here rank and college cutoff and get the opening and closing rank for the expected college and your son eligibility.
Link: https://www.shiksha.com/b-tech/resources/jee-main-rank-predictor

For NIT Trichy, you should have a minimum score of 275 to get good branch. So, prepare yourself with this target hopefully you will achieve it.

Hello Ruhi,
COEP accepts a score of MHT-CET for admission. However, one can use JEE Mains score for admission against all India quota. But seats against this will be announced by the Government of Maharashtra later. In Maharashtra, all the government and government-aided colleges give admission based on MHT-CET only.

Kindly visit this link:
https://www.shiksha.com/b-tech/articles/how-to-calculate-jee-main-rank-from-percentile-blogId-19953

Check out this answer on Shiksha-
https://ask.shiksha.com/what-is-percentile-of-jee-main-having-no-69-qna-5217581?referenceEntityId=5217995
You can check your eligibility in the above link.