Let A, B, C can be pairwise independent events with P(C)>0 and P(A∩B∩C)=0. Then P(Ac∩Bc|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 AP(Ac)−P(B) P[AC∩BCC]=P(AC∩BC∩C)P(C)=P(C)−P(A∩C)−P(B∩C)+P(A∩B∩C)P(C)P(A∩B∩C)=0A,B,CarepairwiseindependentP(A∩C)=P(A)⋅P(C)P(B∩C)=P(B)⋅P(C)∴P(AC∩BC)C=P(C)−P(A)⋅P(C)−P(B)⋅P(C)+0P(C)=1−P(A)−P(B)=P(AC)−P(B)=1−P(A)−P(B)=P(AC)−P(B)