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For general a and b, what does this imply about the relationship among p(a ∩ b), p(a) and p(a ∪ b)?

For general a and b, what does this imply about the relationship among p(a ∩ b), p(a) and p(a ∪ b)?
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For general a and b, what does this imply about the relationship among p(a ∩ b), p(a) and p(a ∪ b)?

User NikoNyrh
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hello :
p(a ∪ b) = p(a) +p(b) - p(a ∩ b)
User Sshturma
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