If $\mathbf{P}(\mathbf{B})=\frac{3}{5}, \mathbf{P}(\mathbf{A} \mid \mathbf{B})=\frac{1}{2}$ and $\mathbf{P}(\mathbf{A} \cup \mathbf{B})=\frac{4}{5}$, then $\mathbf{P}(\mathbf{A} \cup \mathbf{B})^{\prime}+\mathbf{P}\left(\mathbf{A}^{\prime} \cup \mathbf{B}\right)=$ [JEE Main 2023]

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If \(\mathbf{P}(\mathbf{B})=\frac{3}{5}, \mathbf{P}(\mathbf{A} \mid \mathbf{B})=\frac{1}{2}\) and \(\mathbf{P}(\mathbf{A…

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