Hi, Your marks are pretty good and obviously above average to get into some institutes. Your 10th marks might not necessarily be the best but a good news comes along that they do not see it as a criteria for admissions. There are exams like CAT and GMAT for abroad that you need to study and the criteria for it is that you need to have 50% aggregate in any subject in your 12th board exams. These exams are conducted on a yearly basis and mostly in the month of November. There are various institutes that help you crack these exams you can look into it. So, yes you can get into good colleges with a little bit of efforts and a little bit of improvement. Hope this helps. If you still have a doubt feel free to leave a comment.