Question

What's 4P4?

Answer 1

`P_(4,4)=(4!)/((4-4)!)=(4!)/(0!)=(4!)/1=4! =4xx3xx2xx1=24`

Explanation:

This appears to be a question about the permutation of 4 items within a population and all 4 being chosen (an example of this type of question is if you have 4 people sitting down in 4 chairs, how many different ways can they be arranged in those chairs).

The general formula for a permutation is:

`P_(n,k)=(n!)/((n-k)!); n="population", k="picks"`

and will work out this way:

`P_(4,4)=(4!)/((4-4)!)=(4!)/(0!)=(4!)/1=4! =4xx3xx2xx1=24`