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【单选题】
在实务中,保险人厘定保险费率经常采用的纯费率计算公式是( )。A.
A．纯费率=平均保额损失率×稳定系数
B.
纯费率=平均保额损失率+2倍保额损失率的均方差
C.
C．纯费率=平均保额损失率+3倍保额损失率的均方差
D.
D．纯费率=平均保额损失率×(1+稳定系数)
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