You are given that \( \mathrm{A} \) and \( \mathrm{B} \) are two ev...

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You are given that \( \mathrm{A} \) and \( \mathrm{B} \) are two events such that \( \mathrm{P}(\mathrm{B})=\frac{3}{5}, \mathrm{P}(\mathrm{A} \mid \mathrm{B})=\frac{1}{2} \) and \( \mathrm{P}(\mathrm{A} \cup \mathrm{B})=\frac{4}{5} \), then \( \mathrm{P}(\mathrm{A}) \) equals
\( \mathrm{P} \)
VW
(A) \( \frac{3}{10} \)
(B) \( \frac{1}{5} \)
(C) \( \frac{1}{2} \)
(D) \( \frac{3}{5} \)
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