i have 30 marks in jee mains exam and 56% in 12th

You need to look for some private institutes to take admission in engineering. There are some institutes which are taking their own entrance exam and on the basis of student's performance in that exam admission is offered. I am providing the name of some of the institutes where you can try for your

Hi Ashish, To calculate your JEE Main rank, you can refer to the below articles https://www.shiksha.com/jee-main-2014-rank-predictor-how-to-calculate-ranks-and-scores-article-7711-1 https://www.shiksha.com/jee-main-2014-rank-predictor-understanding-percentile-and-normalization-of-class-12th-boa