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Probability Thread

rubik2005

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Joined
Jul 27, 2018
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72
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Florida
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2018RIVE07
Oh! I forgot to post this a couple weeks ago. I just wanted to know what's the probability of getting a LL skip on a kibiminx because I actually got one.
 
Joined
Oct 17, 2017
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Here
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2018OLSE04
chances of having a four mover 2x2 at a comp?
1847/3673775 for each scramble, which is about 1 in 1989.
Oh! I forgot to post this a couple weeks ago. I just wanted to know what's the probability of getting a LL skip on a kibiminx because I actually got one.
There is a 1 in 81 chance of skipping OLL and a 1 in 12 chance of skipping PLL for a 1 in 972 chance of a full LL skip.
 

xyzzy

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Joined
Dec 24, 2015
Messages
1,571
The chances of a cross skip is 1/15840
The calculation is 1/24 x 1/22 x 1/20 x 1/18 x 6
(i) Please don't reply to nine-year-old posts unless it's absolutely relevant and necessary.

(ii) This is almost correct, but it doesn't account for scrambles with multiple crosses already solved… or it would be, if you actually calculated your approximation correctly. Your calculation is off by a factor of two and you should've gotten 1/31680.

(iii) The exact probability is around 1/31704.
 
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2018OLSE04
Just got 6 center skips in 7 consecutive Master pyraminx solves. Each happens with 1/12 probability, so one should expect to see 6 or more out of 7 consecutive solves 78 times out of 12^7 solves, or roughly once every 459382 solves. Not quite as extraordinary as my accidental XXcross on megaminx, but quite rare.
 
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