Hi shruti,

CBSE results have seen a constant improvement and rise in student scoring above 80% marks as compared to previous years. Especially, After change in examination pattern by CBSE and inclusion of 25% objective questions and 33% internal choice in the exam paper has helped students score high percentage. However, there is no exact and official data released specifically for students scoring above 80% in PCM subjects. But as per the results this year it can be estimated that around 25- 30% of the students from science group scored 80% in PCM.

Hope this helps.. Good Luck