Question 1134624
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if 4 {{{highlight(different)}}} numbers from 1 to 1000 are chosen at random, one at a time, find the probability that they will be chosen in decreasing order
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<U>Solution</U>


<pre>
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}}}.
</pre>