Is it tough to study bba for who studied in biology group

Hello,

There is no such thing like that.When you enter a study field related to business and management you will find it difficult to understand anything as all the things you study are new and will sound unrelated to you.But once you will start understanding the topics trust me you will find is very easy as every topic is interrelated to each other.
And the more you will study put time the more you will understand thing clear.

I hope this helps.