CREATE TABLE table_39817 ("Date" TEXT, "Opponent" TEXT, "Location" TEXT, "Result" TEXT, "Attendance" FLOAT)

What is the average Attendance at a game with a Result of w 30-23?
SELECT AVG("Attendance") FROM table_39817 WHERE "Result" = 'w 30-23'
SELECT AVG("Attendance") FROM "table_39817" WHERE "Result" = 'w 30-23'