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Q: How many different ways can 7 things be arranged on a shelf?

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5040

5

24 ways

24 times

The number of ways that 15 books can be arranged on a shelf is the same as the number of permutations of 15 things taken 15 at a time. This is 15 factorial, or 15!, and is 1,307,674,368,000.

The number of permutations of five things taken five at a time is five factorial, or 120.

5*4*3*2*1=120 ways

4 x 3 x 2 different ways, ie 24

There are 2*5! = 240 ways.

it depends on the shelf of course

One row of 5 different brands with each type being represented can be arranged in 5x4x3x2x1= 120 ways

6! = 1 x 2 x 3 x 4 x 5 x 6.

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