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Geometry

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I really need help on this question can someone plz help me.

If P(A)=2/11,P(B)=3/11,and P(C)=4/11, what can you say about P(A or B or C) when P(A and B and C) = 0?

  • Geometry - ,

    P(A∪B∪C) = P(A)+P(B)+P(C)
    if and only if P(A∩B)=0 ∩ P(B∩C)=0 ∩ P(C∩A)=0

    Therefore, when P(A∩B∩C)=0, we can conclude that:
    P(A∪B∪C) ≤ P(A)+P(B)+P(C)
    or
    P(A∪B∪C)
    = P(A)+P(B)+P(C) - (P(A∩B) + P(B∩C) + P(C∩A))

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