TITLE: Probability of exactly one event occurring
QUESTION [1 upvotes]: Event A has probability of 0.7 and Event B has probability of 0.6. If A and B are independent, what is probability that exactly one occurs?

REPLY [2 votes]: Two ways.  1-P(both)-P(neither), or $P(A \cap B')+P(A' \cap B)$
1 minus zero or both events.  Or (A and not B) + (B and not A).
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