In how many ways can you arrange 5 books in a bookshelf?

In how many ways can you arrange 5 books in a bookshelf? Give details

Solutions

Expert Solution

For the first place in your bookshelf, you can choose any of the 5 books. For the second place you have a choice of 4, etc.

The total number of possibilities are thus: 5⋅4⋅3⋅2⋅1

which in maths is abbreviated to

(pronounced as 5 factorial).

n! or "n-factorial" means: multiply all numbers from 1 up to and including n

Most calculators have an x! button. In GC's it's in one of the menus.

120 way

Sankar Maity answered 2 years ago

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