题目内容

What would be the average fixed inspection cost per unit at an activity level of 8,100 machine-hours in a month? Assume that this level of activity is within the relevant range.

A. $50.89
B. $24.30
C. $23.70
D. $32.96

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若随机事件A,B相互独立,则P(A|B)= ,P(B|A)= ,P(AB)= .A.P(A)B.P(B)C.P(A)P(B|A)D.P(A)P(B) E.0

若事件A与B相互独立,且P(A)=0.5,P(B)=0.4,则P(AB)=,P(A|B)=,P(B|A)=,P(A∪B)=.

若P(A)=0,P(B)>0,则A.A与B相互独立B. A与B互不相容 C.A是不可能事件 D.以上都不对

若事件A与B相互独立,事件B与C独立,则事件A,B,C相互独立.

A. 对
B. 错

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