Describe events as subsets of a sample space using unions, intersections, and complements.
Write a verbal event description using union, intersection, or complement notation
Problem
Write “\(A\) or \(B\) occurs” in set notation, using the operation that includes outcomes in \(A\), \(B\), or \(\text{both}\).
Big Picture
What this problem is really about
The phrase or in event language is inclusive unless the problem explicitly excludes overlap. We’ll translate the membership condition, match it to the operation that includes either event and both, write the notation, and rule out intersection and complements by their meanings.
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