题目内容：
右图为某同学5科测评成绩茎叶图，其中一个数字被污损，则该同学总成绩低于班级平均总成绩(450分)的概率为（ ）． 
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答案解析：
单选题：右图为某同学5科测评成绩茎叶图，其中一个数字被污损，则该同学总成绩低于班级平均总成绩(450分)的概率为（ ）．
- 题目分类：小学数学
- 题目类型：单选题
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