Hi there,
Every education board have there own set of rules to provide grace marks to the students. For eg the gujrat board has recently did some change in their rule to add grace marks ( https://timesofindia.indiatimes.com/city/ahmedabad/new-rules-for-promoting-students-to-next-class/articleshow/65586089.cms ) Thus you have to mention your board to get better information.
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