Two events \( E \) and \( F \) are independent. If \( P(E)=0.3, P(E \cup F)=0.5 \), then \( \mat...

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Two events \( E \) and \( F \) are independent. If \( P(E)=0.3, P(E \cup F)=0.5 \), then \( \mathrm{P}(\mathrm{E} \mid \mathrm{F})-\mathrm{P}(\mathrm{F} \mid \mathrm{E}) \) equals
(A) \( \frac{2}{7} \)
(B) \( \frac{3}{35} \)
(C) \( \frac{1}{70} \)
(D) \( \frac{1}{7} \)
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