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OpenStudy (anonymous):
Two events are disjointed. Find P(A or B), if P(A) = 1/7, and P(B) =3/7 .
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jimthompson5910 (jim_thompson5910):
when two events are disjoint, they are also known to be mutually exclusive this means that it is impossible for both events to happen at the same time
jimthompson5910 (jim_thompson5910):
This allows us to say that P(A or B) = P(A) + P(B)
OpenStudy (anonymous):
4/7?
jimthompson5910 (jim_thompson5910):
yep
OpenStudy (anonymous):
thanks :)
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jimthompson5910 (jim_thompson5910):
yw
OpenStudy (anonymous):
?
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