If 4 numbers from 1 to 1000 are chosen at random, one at a time, find the probability that they will be chosen in increasing order. 

neurolover25  Feb 24, 2018


If we choose  any four numbers from the first thousand integers, we will have


C(1000, 4)    different  sets of four numbers


And each can be arranged in 4!  ways  =  24 ways


But only one arrangement  of each of these sets is in the desired order


So....the probability  of the correct arrangement is just   1 / 24



cool cool cool

CPhill  Feb 25, 2018

11 Online Users


New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.