Hi Swathi

You can know about the probable colleges where your sister can get admission on the basis of her JEE Main rank by following any of the two ways:

1- Use the JEE Main College Predictor, a tool prepared by Careers360 for candidates to help them know the probable colleges where they can get admission on the basis of their ranks. The tool is indicative in nature. You need to provide correct information while using it.

Check the procedure to use the tool here - https://engineering.careers360.com/articles/jee-main-college-predictor

OR

2 - You can check the JEE Main previous years' cutoffs for NITs. Follow the link below and estimate the cutoff for this year and your admission chances too.

Https://engineering.careers360.com/articles/jee-main-cutoff

Https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits

Hope this helps.

All the best !