Let's see: https://www.maa.org/sites/default/files/pdf/AMC/usamo/2019/2019%20USAMO%20IDs.pdf https://www.maa.org/sites/default/files/pdf/AMC/usamo/2019/2... On

Let's see: https://www.maa.org/sites/default/files/pdf/AMC/usamo/2019/2019%20USAMO%20IDs.pdf https://www.maa.org/sites/default/files/pdf/AMC/usamo/2019/2... On the first page, the breakdown is 23 kids from public schools, 7 kids from private schools, 4 kids listing some sort of math circle / whatever Arateem is, 5 kids listing universities (home schooled/taking uni courses? No idea). Possibly a few of the private school kids are on scholarship. The 7 kids go to 4 schools.