Two events are **mutually exclusive** if:
Atheir union equals S
Bone is the complement of the other
Cthey always occur together
Dthey cannot occur at the same time (their intersection is empty)
Answer & Solution
Correct answer: D. they cannot occur at the same time (their intersection is empty)
Mutually exclusive: $A \cap B = \phi$ — both cannot happen on the same trial.
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