Let $A$ and $B$ be independent events with $P(A)=0.3$ and $P(B)=0.4$. Find $P(A \cup B)$

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It is known that, $P(A \cup B)=P(A)+P(B)-P(A \cap B)$

$\Rightarrow $ $P(A \cup B)=0.3+0.4-0.12=0.58$

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