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Question

Let A, B, C can be pairwise independent events with P(C)>0 and P(ABC)=0.
Then P(AcBc|Cc) is equal to:


A
P(Ac)P(B)
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B
P(A)P(Bc)
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C
P(Ac)+P(Bc)
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D
P(Ac)P(Bc)
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Solution

The correct option is A P(Ac)P(B)
P[ACBCC]=P(ACBCC)P(C)=P(C)P(AC)P(BC)+P(ABC)P(C)P(ABC)=0A,B,CarepairwiseindependentP(AC)=P(A)P(C)P(BC)=P(B)P(C)P(ACBC)C=P(C)P(A)P(C)P(B)P(C)+0P(C)=1P(A)P(B)=P(AC)P(B)=1P(A)P(B)=P(AC)P(B)

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