What are the odds...
What are the odds...
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Riley Blue

Original Poster:

23,205 posts

256 months

Saturday 19th October 2019
quotequote all
Last night we were playing a board game and with a single dice I threw five 6's in a row - what are the odds of doing that?

Pity they were all of no use to me, I needed a 1...

FredClogs

14,041 posts

191 months

Saturday 19th October 2019
quotequote all
1 in 7776 or in other words 6^6

popegregory

1,916 posts

164 months

Saturday 19th October 2019
quotequote all
FredClogs said:
1 in 7776 or in other words 6^6
6^5, surely?

ILikeCake

417 posts

174 months

Saturday 19th October 2019
quotequote all
The probability of getting five of the same number is 1 in 7776. BUT only if you specify what number you're looking for in advance of the first roll.

In your case I don't think it matters whether you rolled a six first. I.e. you'd have been equally surprised if you had rolled a four five times in a row.

So the probability of rolling any number five times in a row is (1/6)^4. Or 1 in 1296.


NormalWisdom

2,183 posts

189 months

Saturday 19th October 2019
quotequote all
6^6 I think, however, the chance of rolling "any" number 6 times in a row would be 6^5 as the first roll wouldn't count

ILikeCake

417 posts

174 months

Saturday 19th October 2019
quotequote all
Dunno why there is a sixth roll in some of the posts above! The op says five in a row.

TwigtheWonderkid

49,086 posts

180 months

Saturday 19th October 2019
quotequote all
As said, the chances of rolling five 6s on the trot is 1/7776. The odds of rolling the same number five times in a row is 1/1296.

FredClogs

14,041 posts

191 months

Saturday 19th October 2019
quotequote all
popegregory said:
FredClogs said:
1 in 7776 or in other words 6^6
6^5, surely?
I misread the question.

Don't call me Shirley.

Riley Blue

Original Poster:

23,205 posts

256 months

Saturday 19th October 2019
quotequote all
Thanks everyone - bet I can't do it again when I need it. irked

TwigtheWonderkid

49,086 posts

180 months

Saturday 19th October 2019
quotequote all
Riley Blue said:
Thanks everyone - bet I can't do it again when I need it. irked
If you try it enough times, you're bound to do it again. On average you'll do it once in every 7776 attempts.

popegregory

1,916 posts

164 months

Sunday 20th October 2019
quotequote all
TwigtheWonderkid said:
Riley Blue said:
Thanks everyone - bet I can't do it again when I need it. irked
If you try it enough times, you're bound to do it again. On average you'll do it once in every 7776 attempts.
Also not true. He wasn’t after five whatever-number-it-was specifically, he just noticed he rolled five of something in a row. Five of something in a row will come up every 1296 times.

ETA he’s literally just typed “can’t do when needed” so yes, that suggests a required number so 7776.

Edited by popegregory on Sunday 20th October 07:02

anonymous-user

84 months

Sunday 20th October 2019
quotequote all
Ooooh buy a lottery ticket now OP.

dickymint

29,091 posts

288 months

Sunday 20th October 2019
quotequote all
5490 said:
Ooooh buy a lottery ticket now OP.
No buy 5 all with the same numbers........or should it be six nuts