Question

In: Statistics and Probability

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  

5!

 (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

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