To get into Computer Science, you should score at least 60 to 75 percent in the 12th with Physics, Chemistry, and Mathematics. But for top colleges, higher marks like 90 percent or more may be needed.

For a computer science student in the 12th grade, the required marks to get into a good college or program vary by institution, but generally, a minimum of 50-60% aggregate in the 12th standard (with a science background, usually including Physics, Chemistry, and Mathematics) is a common requirement for both Bachelor of Science (B.Sc) and Bachelor of Technology (B.Tech) programs in Computer Science.

For a computer science student in 12th standard the marks required depend on your goal If you want to get admission in a top engineering college or university you should aim for at least 75 percent or above in your board exams Some competitive colleges require 60 percent as minimum eligibility while premier institutions like IITs and NITs may ask for 75 percent in PCM or overall However if your goal is just to pass and be eligible for basic college admission the passing mark is usually around 35 percent depending on your state board or school board It is always better to score high in computer science mathematics and physics to improve your chances in entrance exams and college applications