\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
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The universe \(U = \{BB, BG, GB, GG\}\) lists all two-child family combinations (\(B\) = boy, \(G\) = girl; e.g., \(BG\) = boy then girl). The set \(A = \{BB\}\) includes only families with two boys. What is \(A'\)?
Choose one answer:
\(A' = \{BG, GB, GG\}\)
\(A' = \{BB, BG\}\)
\(A' = \{BG, GB\}\)
\(A' = \{BB, GG\}\)
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