选择题
2022 AMC 8 Problem 19: Regraded Test Scores
Mr. Ramos gave a test to his class of 20 students. The dot plot below shows the distribution of test scores. Later Mr. Ramos discovered that there was a scoring error on one of the questions. He regraded the tests, awarding some of the students 5 extra points, which increased the median test score to 85. What is the minimum number of students who received extra points? (Note that the median test score equals the average of the 2 scores in the middle if the 20 test scores are arranged in increasing order.)
2022 AMC 8 第19题：重新分级的考试成绩
拉莫斯先生对他班上的 20 名学生进行了一次测试。下面的点图显示了测试分数的分布。后来拉莫斯先生发现其中一题有评分错误。他对测试进行了重新评分，给一些学生额外加分 5 分，从而将测试分数中位数提高到 85 分。获得加分的学生最少有多少人？ （注意，如果20个考试成绩按升序排列，中位数考试成绩等于中间2个成绩的平均值。）
A.
2
B.
3
C.
4
D.
5
E.
6