Question 1134955

you got it right:{{{1/24}}}

does {{{1/24}}} include the numbers like 9998,7776,2221? no, you are given numbers from {{{1}}} to {{{1000}}}


When {{{4 }}}numbers are chosen, there are {{{4!}}} possible permutations of them, influencing to their order.

Of this {{{4! = 1*2*3*4 = 24}}} permutations, only one provides the requested decreasing order.

Therefore, the probability under the problem's question is  {{{1/24}}}.