Mr.Garcia asked the members of his health class how many days last week they exercised for at least 30 minutes.The results are summarized in the following bar graph,where the heights of the bars represent the number of students.

What was the mean number of days of exercise last week,rounded to the nearest hundredth,reported by the students in Mr.Garcia's class?( )
Garcia老师询问了他的健康课的学生们上周他们至少锻炼了30分钟的天数是多少。结果总结在以下的柱状图中,柱子的高度表示学生的数量。
Garcia老师的班级的学生们上周平均锻炼了多少天,四舍五入到最接近的百分之一?( )
【考点】平均数问题.
【答案】C
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发布:2024/9/7 0:0:8组卷:1引用:1难度:0.5