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Probability
Mutually exclusive events
13.1 Mutually exclusive events
AQA
Edexcel
OCR A
OCR B (MEI)
Revise
Mutually exclusive
events cannot happen at the same time.
For example, rolling 1 or 2 on a dice is mutually exclusive.
For mutually exclusive events:
\(P(A~\text{or}~B) = P(A∪B) = P(A) + P(B) \)
Important
Mutually exclusive events
\(P(A∪B) = P(A) + P(B) \)
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