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The number of ways is 18C5 = 18!/(5!*13!) = 8,568 ways.
There are 12 ways.
3 items (or people) can line up in 6 different sequences. 6 items (or people) can line up in 720 different sequences.
Technology has affected the way in which people work today compared to the past in many ways. One of the primary ways that people's work has been affected is the speed of communications, email, faxes, and voicemail have all lead to faster communications but less face to face time. Technology has also improved the efficiency of many tasks such as typing form letters, making duplicates and similar repetitive tasks.