Amity University has an advantage over Adamas University due to multiple reasons, but the following points will help you make a decision for yourself.
Yes, you can take admission in BCA at Amity University even if you didn’t have Mathematics or CS in your 12th. You will get direct admission in the course if you have 80+ percentile. However, having Mathematics and CS in +2 will make the coursework a lot easier, since you will already be familiar with some concepts.