A, B, and C take part in a mathematics competition. The total score of A and B is 153 points, the total score of B and C is 173 points, and the total score of A and C is 160 points. The average of A, B, and C is How much is the score.
甲、乙、丙三人参加数学竞赛，甲、乙的总分是153分，乙、丙的总分是173分，甲、丙的总分是160分，甲、乙、丙三人的平均分是多少．
<result>84</result>