2016 AMC 8 第 3 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
3.
四名学生参加考试。其中三人的分数是 ， 和 。如果四人平均分为 ，那么剩下那人的分数是多少？
Four students take an exam. Three of their scores are and If the average of their four scores is then what is the remaining score?
答案：A
小提示：
先求平均分为 时所需的总分
First find the total score needed for an average of .
大提示：
从所需总分中减去三个已知分数
Subtract the three known scores from the needed total.
视频讲解：
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文字解答：
由平均分可知四人总分为 。因此剩下的分数为
所以正确答案是 A。
From the average, we can calculate the sum of the scores to be This means that the remaining score is
Thus, A is the correct answer.
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