一射击运动员一次射击练习的成绩是(单位:环):7,10,9,9,10,这

一射击运动员一次射击练习的成绩是(单位:环):7,10,9,9,10,这位运动员这次射击成绩的平均数是_______环.

 

答案

9

解析:略

 

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