CREATE TABLE table_39621 ("School" CLOB, "Mascot" CLOB, "Location" CLOB, "Enrollment" FLOAT, "IHSAA Class" CLOB, "IHSAA Football Class" CLOB, "# / County" CLOB)

What's the enrollment at 41 Johnson?
SELECT AVG("Enrollment") FROM table_39621 WHERE "# / County" = '41 johnson'
SELECT AVG("Enrollment") FROM "table_39621" WHERE "# / County" = '41 johnson'