Hi aspirant,
The eligibility criteria for bcom at St. Xaveirs college is as follows-10+2 with an aggregate of 60% along with passing marks in English. Since you are eligibke your can apply in this univeraity. Merit list deoends on number of students that apply and the highest percentage out of them which may vary every year. The cutoff lies around 90% so chances of getting admitted are less but but you may have chance is another round of counselling.