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 2021-12-02, 13:04 #1 Xyzzy     Aug 2002 23×1,051 Posts December 2021
 2021-12-02, 13:40 #2 uau   Jan 2017 11110012 Posts The example doesn't seem to match the given score. With n=5 and m=15, the last term in the sum (k=5) is: (n * a[s[k]] / m)**k = (5 * 6 / 15)**5 = 2**5, which alone is much more than the claimed total sum of 1.25. Also the distribution variables are first said to use 1-based indexing, even though the permutation then used with them uses 0-based indexing - taken literally, the a[s[k]] part would result in a "list index out of range" failure.
2021-12-02, 13:52   #3
Dr Sardonicus

Feb 2017
Nowhere

2·2,677 Posts

Quote:
 Originally Posted by Xyzzy https://research.ibm.com/haifa/ponde...ember2021.html
Quote:
 such that if a ball hits a pin, it as equal probability to fall to the right or to the left
They need a proofreader! That should be has!

Leave making typos to me - I make enough for everybody!

2021-12-03, 03:08   #4
EdH

"Ed Hall"
Dec 2009

22×3×349 Posts

Quote:
 Originally Posted by Dr Sardonicus They need a proofreader! That should be has! Leave making typos to me - I make enough for everybody!
I'm surprised you didn't mention the other two in the same paragraph:
Code:
... above which are places rows of pins, ...
...
... funnel from which balls drop balls on the pins.

 2021-12-03, 09:29 #5 SmartMersenne   Sep 2017 3·41 Posts With so many ill-defined problems, I am OK to ignore all English errors. The quality of the puzzles really dropped since the puzzlemaster has changed. There are always some mistakes in the problems, and it is happening every month, now. There is also the problem of infrequent feedback and updates to the website.
 2021-12-08, 14:32 #6 tgan   Jul 2015 29 Posts December Puzzle was updated Puzzle was updated it is multifurcation and not sum

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