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

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'