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OpenStudy (anonymous):
Events A and B are mutually exclusive. Also, P(A) = 0.28 and P(B) = 0.3. What is P(A or B)?
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OpenStudy (anonymous):
add
OpenStudy (anonymous):
got it? add the two up because if they are mutually exclusive the intersection is empty (that is what mutually exclusive means) so the probability of the intersection is zero, an therefore the probability of the union is the sum of the probabilities
OpenStudy (anonymous):
ya 0.58
OpenStudy (anonymous):
yup
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