Ononot — Let A and B be two events such that P(A) = 0.5, P(B) = 0.4,

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Conditional Probabilitymedium

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Let $A$ and $B$ be two events such that $P(A) = 0.5$ , $P(B) = 0.4$ , and $P(A \cup B) = 0.7$ . What is the conditional probability $P(A^c | B^c)$ ?