Discuss the conditions under which P (A or B) = P (A) + P (B) is true

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Mireya Salazar

Mathematics

22 May, 10:22

Discuss the conditions under which P (A or B) = P (A) + P (B) is true

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Molly Ferrell · Answer 1

That condition is true if P (A) and P (B) are independent of one another. For example, if I was pulling marbles out of a bag, if I am replacing the marbles back after I pull one out, then P (A or B) = P (a) + P (B).