If \( A \) and \( B \) are mutually excusive events then \( \mathrm...

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If \( A \) and \( B \) are mutually excusive events then
\( \mathrm{P} \) \( P(A \cup B) \)

W
(1) \( P(\mathrm{~A})+P(\mathrm{~B})-P(A \cap B) \)
(2) \( \quad P(\mathrm{~A})+P(\mathrm{~B}) \)
(3) \( \quad P(\mathrm{~A})+P(\mathrm{~B})+P(A \cap B) \)
(4) None of these
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