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QUESTION
Suppose the probability that a U. resident has traveled to Canada is 0.18, to Mexico is 0.09, and to both countries is 0.
Suppose the probability that a U.S. resident has traveled to Canada is 0.18, to Mexico is 0.09, and to both countries is 0.04. What is the probability that an American chosen at random has
(a) Traveled to either Canada or Mexico?
(b) Neither traveled to Canada nor Mexico?
