To apply for BA Maths at Rajendra Prasad Degree College, first ensure you meet the eligibility criteria, which is completion of 10+2 with mathematics as one of the main subjects. Next, fill out the application form and submit the necessary documents, including your 10+2 mark sheets, identity proof, and photographs. As selection is based on merit in your 10+2 examinations, if you are selected, you'll receive an admission offer. Confirm your seat by paying the Rajendra Prasad Degree College fees.