CREATE TABLE table_68635 ("Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Loss" TEXT, "Attendance" FLOAT, "Record" TEXT)

What was the average attendance when the record was 17-18?
SELECT AVG("Attendance") FROM table_68635 WHERE "Record" = '17-18'
SELECT AVG("Attendance") FROM "table_68635" WHERE "Record" = '17-18'