图1所示的茎叶图记录了甲、乙两组各5名学生在一次英语听力测试中

1所示的茎叶图记录了甲、乙两组各5名学生在一次英语听力测试中的成绩(单位:).

1

已知甲组数据的中位数为15,乙组数据的平均数为16.8,则xy的值分别为(  

A.   25        B.  55        C 58       D  88

答案

C

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