单项选择题
A.试验 B.事件 C.样本 D.概率
A.8%和23.37% B.8%和25.37% C.9%和23.37% D.9%和25.37%
A.0.7 B.0.8 C.0.9 D.1
A.215.43 B.156.65 C.179.80 D.203.13
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