Mathematics, 27.06.2019 11:00, michaelishawilliams

Given two events a and b of a sample set where p[a] = .20 p[not b] = .40 p[b|a] = .25 what is p[a or b]?

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Given two events a and b of a sample set where p[a] = .20 p[not b] = .40 p[b|a] = .25 what is p[a or...