Hello student I'm sorry to inform you but you've not mentioned the course you're willing to pursue in St Xavier so I'm unable to provide you the exact information as admission process vary upon courses. Admission is based on either cut off released or through entrance examination conducted by the institute/college.

You can't get direct admission in St Xavier college as it's one of the best college you need to apply for the course and on the basis of selection process as mentioned above you'll get admission.

Feel free to comment if you've any doubt

Good luck