Based on your JEE Main percentile and TS board marks, let's assess your chances of getting a seat at SASTRA University. SASTRA primarily considers two streams for B.Tech admissions:

• Stream 1: 70% of the seats are filled based on a combination of JEE Main score (25% weightage) and normalized Class XII marks (75% weightage).
• Stream 2: The remaining 30% of the seats are filled solely based on normalized Class XII marks (100% weightage).

With a 76.7 percentile in JEE Main, your performance in this entrance exam is a significant factor for Stream 1. To estimate your potential in Stream 1, we would need to know your approximate JEE Main score corresponding to this percentile. However, a 76.7 percentile generally suggests a decent score that will contribute to your combined score.

Your Telangana board marks of 910 are also crucial, especially for Stream 2. SASTRA normalizes the Class XII marks from different boards to create a merit list for this stream. A high score like 910 indicates a strong academic performance in your board exams, which will be highly beneficial for admission through Stream 2.

Given that SASTRA considers both JEE Main scores and board marks, you have a good chance of securing a seat. Your high board marks will be advantageous for both streams. For Stream 1, your JEE Main percentile will be combined with your normalized board marks. For Stream 2, you will be considered solely based on your normalized board marks.

I hope this helps.