Hi there.

You can enroll in the Science stream if you earn 60 percent of the possible points in your 10th-grade class, but it will depend on the school to which you wish to be admitted.

Generally speaking, reputable colleges accept applicants with a 10th grade GPA of at least 70%. You can therefore be admitted to any institution, but you should aim to improve your 10+2 grade in order to enter a decent career, since this level serves as the starting point for many careers in the science field.

There are no restrictions imposed by cbse regarding any particular percentage to get admitted to any school after 10th. You can apply to any school of your choice. But of course every school has different criteria of taking the students which you have to ask the authorities.