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已知数据:2,,3,5,6,5,则这组数据的极差是
已知数据:2,,3,5,6,5,则这组数据的众数与极差的和是 .
已知数据:2,,3,5,6,5,则这组数据的极差是( )
A.5 B. 7 C. 3 D.6