The union of events A and B, denoted by A ∪ B, ________.
A) contains all outcomes that are in A or B
B) contains all outcomes of an experiment
C) contains no outcomes that are in A and B
D) consists only of outcomes that are in A and B

Question

Quizplus · Accepted Answer

The union of events A and B includes all outcomes that are in either A or B or both, so option A is the correct choice. Option B is incorrect because the union is not necessarily all outcomes of the experiment as some outcomes may not be in either A or B. Option C is incorrect because the union may contain outcomes that are in both A and B. Option D is incorrect because the union may include outcomes that are not exclusively in A and B.

The Union of Events a and B, Denoted by a ∪