For events A and B, the formula $P(A \cup B) = P(A) + P(B) - P(A \cap B)$ is called:
Amultiplication rule
Bcomplement rule
CBayes' theorem
Dinclusion-exclusion principle (addition rule)
Answer & Solution
Correct answer: D. inclusion-exclusion principle (addition rule)
Addition rule / inclusion-exclusion. Subtract intersection to avoid double-counting.
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