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- January 8th 2011, 10:04 AM #1

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- January 8th 2011, 10:13 AM #2

- January 8th 2011, 10:17 AM #3

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- January 8th 2011, 10:21 AM #4
The union is defined to be: . So it turns out that there doesn't need to be an overlap between two sets in order to take their union. If there is an overlap, you would count that element just once.

However, if you ended up taking the**intersection**, it would be empty because there are no common elements.

- January 8th 2011, 10:22 AM #5