dylanatkinson2 dylanatkinson2
  • 20-06-2017
  • Mathematics
contestada

How many ways can a librarian arrange 15 books on a top shelf if she has 20 books from which to pick?
20!/5!
20!/15!
15!/5!

Respuesta :

jimthompson5910 jimthompson5910
  • 20-06-2017
Use the permutation formula
nPr = (n!)/((n-r)!)
20P15 = (20!)/((20-15)!)
20P15 = (20!)/(5!)

The final answer is choice A

Answer Link
ashleybokros ashleybokros
  • 10-07-2018
The correct answer is A turned this in got a 100 hoped this helped ya.
Answer Link

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