单选题:某项目其产品价格可能出现三种状态值70元/吨,80元/吨和100元/吨,经专家估计,三种状态的可能性为30%,60%,1

题目内容:
某项目其产品价格可能出现三种状态值70元/吨,80元/吨和100元/吨,经专家估计,三种状态的可能性为30%,60%,10%,则产品价格的期望值是(  )元/吨。 A.69
B.79
C.44
D.38

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