CREATE TABLE table_24727 ("School" TEXT, "Location" TEXT, "Enrolment" FLOAT, "Founded" FLOAT, "Denomination" TEXT, "Boys/Girls" TEXT, "Day/Boarding" TEXT, "School Colors" TEXT)

How many values for founded when enrollment is 850?
SELECT COUNT("Founded") FROM table_24727 WHERE "Enrolment" = '850'
SELECT COUNT("Founded") FROM "table_24727" WHERE "Enrolment" = '850'