What's 4P4?

1 Answer
MathFact-orials.blogspot.com
Mar 5, 2017

#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#

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