Hello Aspirant

If we talk about chartered accountants course, than it includes Mathematics, Accounts, Tax, Auditing and Laws related to it.

In you case, you have maths and biology so you already know the basics of one subject i.e maths.

If we talk about clearing exams in first attempt than only 5-6% people are able to do this and overall every year less than 1% out of 100% get the CA final degree from ICAI.

It's not easy for anyone to convert in first attempt but yes, its not impossible too.

Many students have achieved it with their dedication towards CA and their future goals.

It's totally possible if you stay motivated and keep studying smart, than you can definitely clear CA in first attempt.

Hope this information would be helpful for you.

All the best