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For a group of 9 steel beams stored together, the average (arithmetic mean) length of the beams is 7.2 meters and the median length is 8.4 meters. Two additional steel beams—one that is longer than all 9 beams and one that is shorter than all 9 beams—will be stored with the 9 beams. For the combined group of 11 steel beams, the average length is m meters and the median length is d meters. Which of the following statements must be true?
Indicate all such statements.
Indicate all such statements.
E显示答案
以上解析由 考满分老师提供。
