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OpenStudy (anonymous):
find the indeical probl if p(a or b) =0.8 p(a)=0.5 and p(a and b)=0.15 find p(b)
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OpenStudy (anonymous):
0.45
OpenStudy (watchmath):
P(a or b) = P(a) +P(b)-P(a and b) 0.8 = 0.5+P(b)-0.15 0.8=0.35+P(b) P(b)=0.45.
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