BBA

ZHI / IIBM is one of the most reputed Business Schools in Bihar and situated at the heart of the Patna. The most happening and rocking place of Patna, Maurya Lok is around 5 minutes' walk from the campus and the world famous Patna Museum is located at just other side of front gate. If you wish to bunk any lecture, the Patna Museum or Maurya Lok could be the best place for roam around. Several hostels and PGs are available nearby for out station students. Patna city and ZHI / IIBM could be the best suited institute for those who can't afford a big cost for their management studies.
Education in Patna: It's a city full of students from different streams. Few are preparing for IIT and other engineering colleges while few are preparing for medical entrance exams. Some aged students are preparing for IAS and PO exams and some aspirant business leaders are preparing for GRE, GMAT, CAT and MAT. In short you will find students from each and every stream of education here. There are numerous reasons for this trend. The accommodation and living cost of the city is very low and students from low or middle income group can also afford this. The atmosphere supports the education system here. You can easily find like-minded student groups and you can start your group study. The standards of Teachers and Coaching institutes are very high and they don't compromise with their quality.

There is no "Top BBA College" in NZ, most of the institutes provide good quality of education. There are 3 types of Tertiary Education Providers, Universities, Government owned Institutes also known as ITPs & Private Institutes (PTEs). There is no official ranking system for any of these education providers. The Universities are research oriented whereas ITPs are vocational in nature & provide practical education; ITPs produce "Work Ready Graduates" PTEs are usually niche education providers & offer courses in a few focus areas. You should decide your academic & professional aspirations first; this will help you choose the appropriate education provider for you. You may consult a NEW ZEALAND SPECIALIST AGENT to help you choose the right course & institute. For any further queries, please feel free to contact me. Also kindly mark this answer as best if you feel comfortable.

Opting for commerce without maths is not a problem at all. You can easily pursue many courses like BBA which is Bachelors in business administration and MBA (Masters in business administration) and even CA.
Yes, of course, you need to take an entrance exam for some courses and maths will be there but the question will be related to basic mathematics like percentage, ratio and proportion, Time work, energy, etc.
So, no need to worry about the entrance exams as with little practice of basics maths topics, you can clear them easily and enrol for your desired course.
I would like to tell you that people very often confuse that maths in commerce is mandatory and one cannot excel without it, but it is a complete misconception. No doubt, it will help you grasp and learn many things fast but it is not compulsory to grow and succeed in commerce line. There are many options and lines in commerce which demand less of maths like CA and CS (company secretary), but the only advantage will be the calculation speed and accuracy. You can even go for MBA in finance at Master's degree level courses, generally, calculators are allowed and not to worry that much about calculation part at all.
So, just complete your course well with maths or without maths. It doesn't matter that much, what matters more is a good score and doing good in what you opt for. It is always important to go for the area in which you have interest rather than getting stuck with something in which you are not interested at all.