With a GATE BT score of 55.33 and an All India Rank (AIR) of 306, your chances of getting into the M.Tech in Data Science program at IIT Roorkee depend on the competition and the cutoff scores for that specific year. Generally, IITs have competitive cutoffs, and previous years’ cutoffs can give you an idea. However, since Data Science is popular, it might be challenging. It's best to keep checking the official IIT Roorkee admission website for updates on cutoffs and eligibility