Hello Dear,

To study in Science stream you have to marks 60% in each subjects but it varies from school to school. There are PCM, PCB, PCMB as a subject in the course. With minimum of 75% helps you better in future for any courses in future. If you passed your 10th that is actually enough to get you to your 11th, but with at-least 75% gets you into decent 12th standard schools.

Good Luck!