一组数据中有a个x1,b个x2,c个x3,则这组数据的平均数是( )(A)x1+x2+x3 (B)a+b+c (C)ax1+bx2+cx3 (D)ax1+bx2+cx3—————— ————— ———————— ————————3 3 3 a+b+c根据公式③
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![一组数据中有a个x1,b个x2,c个x3,则这组数据的平均数是( )(A)x1+x2+x3 (B)a+b+c (C)ax1+bx2+cx3 (D)ax1+bx2+cx3—————— ————— ———————— ————————3 3 3 a+b+c根据公式③](/uploads/image/z/10437267-3-7.jpg?t=%E4%B8%80%E7%BB%84%E6%95%B0%E6%8D%AE%E4%B8%AD%E6%9C%89a%E4%B8%AAx1%2Cb%E4%B8%AAx2%2Cc%E4%B8%AAx3%2C%E5%88%99%E8%BF%99%E7%BB%84%E6%95%B0%E6%8D%AE%E7%9A%84%E5%B9%B3%E5%9D%87%E6%95%B0%E6%98%AF%EF%BC%88+%EF%BC%89%EF%BC%88A%EF%BC%89x1%2Bx2%2Bx3+%EF%BC%88B%29a%2Bb%2Bc+%EF%BC%88C%EF%BC%89ax1%2Bbx2%2Bcx3+%EF%BC%88D%EF%BC%89ax1%2Bbx2%2Bcx3%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94+%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94+%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94+%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%943+3+3+a%2Bb%2Bc%E6%A0%B9%E6%8D%AE%E5%85%AC%E5%BC%8F%E2%91%A2)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/08/05 04:39:25