Hello Naveena,

Admission is through 2 ways i.e board exam + jee mains (phase 1 {70% admission through this})and only board exam(phase 2{30%})

If you have scored between 120-150 marks in jee main then you can get into sastra but if you want to get through phase 2 process then you need to have 90-95% in board exam.

So if you are falling in this categoary then you can get into sastra 

Hope I helped you.All the best for future endeavour!!