\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Let \( P(A) = 0.5 \), \( P(B) = 0.3 \) and \( P(A \text{ and } B) = 0.1 \).
Calculate \( P(A \text{ or } B) \).
\( P(A \text{ or } B) = \)