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What is probability that tourist visited at least one place

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It was found that 60 percent of the tourists to China visited the Forbidden City, the Tem- ple of Heaven, the Great Wall, and other historical sites in or near Beijing. Forty percent visited Xi'an with its magnificent terracotta soldiers, horses, and chariots, which lay buried for over 2,000 years. Thirty percent of the tourists went to both Beijing and Xi'an. What is the probability that a tourist visited at least one of these places?

Reference no: EM13867947

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