The cutoff marks needed to join a B.Sc. (Bachelor of Science) degree course can vary significantly depending on several factors. It's not a fixed number, and it changes from year to year and across different institutions. Here are the key aspects that influence B.Sc. cutoff marks:

Type of Institution: Prestigious central universities and well-regarded government colleges generally have much higher cutoff marks compared to private colleges or lesser-known institutions. The demand for seats in these top-tier colleges is higher, leading to increased competition.

Specific B.Sc. Program: The particular specialization you choose within B.Sc. will also affect the cutoff. For instance, popular programs like Computer Science, Biotechnology, or Nursing might have higher cutoffs than less sought-after specializations.

Entrance Exams vs. Merit-Based Admission: Some universities admit students based on their performance in entrance exams like CUET (Common University Entrance Test), while others rely on the marks obtained in your Class 12th board examinations. For entrance-based admissions, the cutoff will be a rank or a score in the entrance test. For merit-based admissions, it will be a percentage of marks in your qualifying exam.

Category of Applicant: Reservation policies in India ensure that seats are reserved for various categories like SC (Scheduled Caste), ST (Scheduled Tribe), OBC (Other Backward Classes), EWS (Economically Weaker Sections), and PwD (Persons with Disabilities). The cutoff marks for these reserved categories are typically lower than the general category.

Number of Applicants and Seats: The total number of students applying for a specific B.Sc. program in a particular college and the number of seats available will also play a crucial role. Higher applicant numbers and limited seats will naturally lead to higher cutoffs.

Difficulty Level of Exams: For programs that use entrance exams, the difficulty level of the exam in a given year can influence the cutoff. If the exam is tougher, the cutoff might be slightly lower, and vice versa.

Previous Year's Trends: While not a definitive predictor, the cutoff marks from previous years can give you a general idea of what to expect. However, these trends can change based on the factors mentioned above.

To get into good B.Sc. programs, expect high cutoff marks. For top central universities using CUET, general category students often need scores above 180-200 out of 250 in relevant subjects, which means a high percentile. If colleges admit based on Class 12th marks, you'll likely need 70-90% or even more in good institutions, depending on the course. Reserved category students can usually expect lower cutoff marks compared to the general category. The exact cutoffs vary by university, college, specific B.Sc. subject, and the number of applicants each year.

I hope this helps.