Hello Shipra,

Since your friend has achieved a score of 450 and 36.6 marks in the gate examinations, you have a slight chance to get admission in the nits.
Also want to tell you that what course or subject you wish to study also plays a vital role, but as u mentioned in SC category, you still might get a chance.

and for further details, you can even visit our website, where there is a detailed description of all the major courses offered by the NIT's and which one would be the best for you.

https://engineering.careers360.com/articles/nit-mtech-admissions