Answer
$P(F~|~E)=0.75$
Work Step by Step
$P(E~and~F) = 0.6$ and $P(E) = 0.8$
Using the Conditional Probability Rule (see page 288),
$P(F~|~E)=\frac{P(E~and~F)}{P(E)}=\frac{0.6}{0.8}=0.75$.
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