Has an AFL game ever ended 55-47?
Yes. AFL has seen a final score of 55-47 2 times. It first happened on June 15, 1907, when Melbourne beat Fitzroy, and most recently on August 29, 1981, when Geelong beat Essendon.
That makes 55-47 the 2421st most common final score out of 6,607 that have ever occurred in AFL. One point away, 56-47 has happened 2 times and 55-48 has happened 1 times. At one point the score disappeared for 74 years, between 1907 and 1981.