World Bank studies says 1.3% study in Madrasses

Wow, you're just being dense now. It's meaningless without knowing what the 1.3% means. 1.3% of what? Of households? Of people who send other kids to regular schools? Of urban population? Of rural population. Of school age children? Of school age children who actually go to school? That's why I asked about methodology. I suggest you take a research 101 course.