Who jasmine is walking a group of 6 dogs. in how many different orders can the dogs enter her house in single file ro get a drink of water?
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Answer:
Any dog can be first, so that's 1 of the 6. The 2nd dog can be any 1 of 5. Then 1 of 4, etc, so it's 6x5x4x3x2x1. That's 6!, or 6 factorial. 6 factorial = 720, so there are 720 different orders. More than you'd think at 1st glance.
Gregory A. at ChaCha Visit the source
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