Question

having numbers 1-n which are randomly order
what is the probablility that the numbers are in ascending or descending order? help thx

Answer 1

damned unlikely i would imagine
we can do it with 1,2,3 and see how it works
only one arrangement is in ascending order out of a total of \(3!\) arrangements

Answer 2

since it is "ascending or descending" my guess is \[\frac{2}{n!}\]

Answer 3

since there is two ways it could happen right

Answer 4

am guess too that seems about right