June 20th, 2017, 04:16 AM  #21 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,398 Thanks: 829 
Thank you, thank you,.......,thank you Jks. You have taken pounds off my head! I just reran my program; 3 simulations of 1 million each: 389,769 390,135 389,503 I kept looking at my program, at least once daily, and simply couldn't see any flaws...but felt there must be something wrong with it, since I was so far off Jeff's and MATHEMATICIAN's results. Btw, this exercise would be so much simpler if it consisted of: 1: the first 23 numbers are different 2: the 24th number matches one of the first 23 Thanks again. 
June 21st, 2017, 01:21 AM  #22  
Senior Member Joined: Feb 2016 From: Australia Posts: 1,591 Thanks: 546 Math Focus: Yet to find out.  Quote:
 

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