Nehru Arts and Science College

There is no specific number of students who can do a BBA at Nehru Arts and Science College. It is totally dependent on the requirements of the course and seat availability in a BBA course.10+2 passing certificate is required for entry into UG programs.
Although, Admission to all courses is based on merit in the qualifying test.

There is no cutoff system in NASC .
Here I am sharing selection process steps it may help you .

The steps in the NASC Coimbatore BSc selection process include completing the application, showing up for the Tamilnadu 12th, and taking part in the counseling session.

See this page for the step-by-step selection procedure:

Enroll in and complete the Tamilnadu 12th exam.
Students are required to register for NASC Coimbatore BSc counseling based on their Tamilnadu 12th results.

At NASC Coimbatore, BSc specializations in areas such as Microbiology, Computer Science, Information Technology, Forensic Science, and Catering Science & Hotel Management are available. The annual cost of the three-year NASC Coimbatore BSc programme starts at 24,000 INR and can reach up to 90,000 INR, depending on the specialization.

UG programme offered by the college include B.Sc. There are 14 streams available for the B.Sc. programme . All of these courses have admission based only on merit. The fundamental requirements for admission to the  program are that B.Sc. applicant must have passed the 10+2 exam from an accredited board of education, and the candidate must have completed the 10+2 exam with PCM/PCB from an accredited board to be considered for the B.Sc. program.Minimum score required totally depends on the cutoff.

No, CUET is not  required for BSc at Nehru Arts and Science College.
Candidates who are interested in enrolling in NASC's B.Sc. programme are chosen solely on the basis of their merit.