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Question 12.8E3: Cell Phones In how many different ways can six different cel......

Cell Phones
In how many different ways can six different cell phones be arranged on top of one another?

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Since there are six different cell phones, the number of permutations is 6!.

6!  =  6  ⋅  5  ⋅  4  ⋅  3  ⋅  2  ⋅  1  =  720

The six cell phones can be arranged in 720 different ways.

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