\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Let \( P(E) = 0.8 \), \( P(F) = 0.3 \) and \( P(E \text{ and } F) = 0.2 \).
Calculate \( P(E \text{ or } F) \).
\( P(E \text{ or } F) = \)