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OpenStudy (anonymous):
Events A and B are disjointed. P(A) = 1/10 P(B) = 3/10 Find P(A or B).
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OpenStudy (anonymous):
I think you had a similar question yesterday. Since the events are disjoint (mutually exclusive): \[P(A \cup B) = P(A) + P(B)\]
OpenStudy (anonymous):
i got 3/20
OpenStudy (anonymous):
You're trying to multiply fractions again. This is an addition.
OpenStudy (anonymous):
4/20 ?
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