CREATE TABLE table_72780 ("Institution" TEXT, "Location" TEXT, "Founded" FLOAT, "Affiliation" TEXT, "Enrollment" FLOAT, "Team Nickname" TEXT, "Primary conference" TEXT)

What was the enrollment of the school founded in 1846?
SELECT "Enrollment" FROM table_72780 WHERE "Founded" = '1846'
SELECT "Enrollment" FROM "table_72780" WHERE "Founded" = '1846'