The probability of sum of the incompatible events A and B :can be compute by such formula P(AB) = P(A) · P(B/A) P(AB) = P(A) · P(B) P(A + B) = P(A) + P(B). P(A + B) = P(A) + P(B) - P(AB).
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The question seems to have a mix-up in the notation and concepts. In probability theory, "incompatible events" (also known as mutually exclusive events) cannot happen at the same time. For such events, the correct formula to find the probability of either event A Show more…
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