已知一组数据a1,a2,a3,a4的平均数是2017,则另一组数据a1+3,a2﹣2,a3﹣2,a4+5的平均数是________ .
更新时间:2018-04-27 21:56:56
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【知识点】 利用已知的平均数求相关数据的平均数解读
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【推荐1】若x1,x2,…,x9这9个数的平均数
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【推荐2】已知一组数据
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