evening
how do I show that the probability that exactly one of the events A or B occurs equals P(A) + P(B) - 2*P(AB)?
i know that i'm supposed to use the axioms of probability, but i don't know where to start
evening
how do I show that the probability that exactly one of the events A or B occurs equals P(A) + P(B) - 2*P(AB)?
i know that i'm supposed to use the axioms of probability, but i don't know where to start