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Among 1,000 first year business students, 610 are enrolled in an Economics course, 500 are enrolled...

Among 1,000 first year business students, 610 are enrolled in an Economics course, 500 are enrolled in a Mathematics course, and 280 are enrolled in both an Economics and a Mathematics course. What is the probability that a first-year business student selected at random from this group is enrolled in exactly one of these two courses?

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