Science

Approximately 300 marks will be sufficient for getting a good college.
Here is a link you can go through, it will be helpful.
https://www.shiksha.com/nursing/course/bsc-in-nursing-government-medical-college-nagpur-191849
Best of luck.

The total course fee for Biotechnology at Anna University is INR 1, 45,000 for 4 years.

In computer science, there are maths and logic as well as many algorithms. Also, there is no any such combination that you want. Or, you can choose B.Tech LL.B. But there is little maths only. Best of luck.

The essential eligibility criteria for B.Sc-HHA programme from premier college of hotel management like Institute of Hotel Management (IHMs) and IIMs is 10+2 with English or equivalent from a recognized board/University. Because, your basic qualification is class 10th only, it is not enough for admission in B.Sc Hotel management programme. Further, on the basis of professional Diploma and class 10th, you cannot get admission for B.Sc Hotel management courses.

Kindly click the link below. https://www.shiksha.com/mba/colleges/mba-in-agri-business-colleges-delhi-ncr.

Kindly click the link below.
https://www.shiksha.com/careers/botanists-161

As per my knowledge and experience, for MBA the main qualifications is that you have to graduate and if you have done Hotel Management, it means you be graduated. So, you can get admission for MBA.