Science

Math

Humanities

... and beyond

Socratic Meta
Featured Answers

Topics

How do you evaluate #9P4#?

1 Answer

Dec 16, 2016

# " "^9P_4" "=3024#

Explanation:

# " "^nP_r" "#has the formula

# " "^nP_r" "=(n!)/((n-r)!)#

so# " "^9P_4" "=(9!)/((9-4)!)#

so# " "^9P_4" "=(9!)/(5!)=(9xx8xx7xx6xxcancel(5!))/cancel((5!)#

# " "^9P_4" "=(9!)/(5!)=9xx8xx7xx6=3024#

Related questions

See all questions in Probability and Permutations

Impact of this question

44186 views around the world

You can reuse this answer
Creative Commons License