dice probability

Started by TinyTerrain, 09 March 2013, 12:47:43 PM

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TinyTerrain

09 March 2013, 12:47:43 PM
Need help, my head hurts!

Whats the probability of rolling any double if using 2 dice?

What about the probability of rolling either double 1 or double 6, on 2 dice?

Thanks in advance,

Cheers

Craig

Luddite

09 March 2013, 12:53:02 PM #1
http://www.durhamwargames.co.uk/
http://luddite1811.blogspot.co.uk/

"It is by tea alone i set my mind in motion.  It is by the juice of Typhoo my thoughs acquire speed the teeth acquire stains, the stains serve as a warning.  It is by tea alone i set my mind in motion."

"The secret we should never let the gamemasters know is that they don't need any rules." - Gary Gygax
"Maybe emu trampling created the desert?" - FierceKitty

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Albie Bach

09 March 2013, 01:08:00 PM #2
Quote from: TinyTerrain on 09 March 2013, 12:47:43 PM
Whats the probability of rolling any double if using 2 dice?
1/6

Quote from: TinyTerrain on 09 March 2013, 12:47:43 PM
What about the probability of rolling either double 1 or double 6, on 2 dice?
I need to clarify what you mean.
To roll double 1 the probability is 1/36
To roll double 6 the probability is 1/36 again
To roll either double 1 OR double 6 on the same throw - the probability is 1/18 (2/36)

All assuming d6 of course  ;)
Sadly no longer with us - RIP (2018)

FierceKitty

09 March 2013, 02:51:33 PM #3
On the other hand, NEVER play the odds. If there's a one in a hundred chance that a particular set of rolls can wreck an exceptionally intelligent and well-executed plan, it'll come up seven times out of five. I speak from bitter and repeated personal experience. :'(
I don't drink coffee to wake up. I wake up to drink coffee.

Nosher

09 March 2013, 02:53:24 PM #4
Quote from: FierceKitty on 09 March 2013, 02:51:33 PM
On the other hand, NEVER play the odds. If there's a one in a hundred chance that a particular set of rolls can wreck an exceptionally intelligent and well-executed plan, it'll come up seven times out of five. I speak from bitter and repeated personal experience. :'(

I know quite a few people with that particular affliction!
I don't think my wife likes me very much, when I had a heart attack she wrote for an ambulance.

Frank Carson

Techno

09 March 2013, 02:57:09 PM #5
 ;D ;D ;D

I'm the opposite.....

Four rolls with 2 X D10.
3 came up 00 = 100
1 came up 99 = 99.

Didn't 'arf do some damage. ;)....You don't forget things like that. ;D ;D ;D
Told you I was lucky !!
Cheers - Phil.

Luddite

09 March 2013, 03:19:09 PM #6
Quote from: FierceKitty on 09 March 2013, 02:51:33 PM
On the other hand, NEVER play the odds. If there's a one in a hundred chance that a particular set of rolls can wreck an exceptionally intelligent and well-executed plan, it'll come up seven times out of five. I speak from bitter and repeated personal experience. :'(

;D ;D ;D ;D
http://www.durhamwargames.co.uk/
http://luddite1811.blogspot.co.uk/

"It is by tea alone i set my mind in motion.  It is by the juice of Typhoo my thoughs acquire speed the teeth acquire stains, the stains serve as a warning.  It is by tea alone i set my mind in motion."

"The secret we should never let the gamemasters know is that they don't need any rules." - Gary Gygax
"Maybe emu trampling created the desert?" - FierceKitty

2012 Painting Competition - Runner-Up!

"I have become inappropriately excited by the thought of a compendium of OOBs." FSN

Duke Speedy of Leighton

09 March 2013, 03:45:57 PM #7
However, the odds of rolling a one in a d6 increase to 1 (probability being measured in fractions) immediately when the phrase 'you need anything but a 1!' is uttered.
My wife got so sick of hearing of my ones she found a dice that went 2-7!!!  8)
You may refer to me as: Your Grace, Duke Speedy of Leighton.
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Nosher

09 March 2013, 04:23:57 PM #8
My wife gets sick of hearing about me playing with my one too.....

:-[

As my dear old Dad used to say, "I'm glad I was born a boy, t'otherwise I'd have had sod all to play with...!"
I don't think my wife likes me very much, when I had a heart attack she wrote for an ambulance.

Frank Carson

Fenton

09 March 2013, 04:41:53 PM #9
 'you've a million to one chance' comes up 9 times out of 10

According to Mr Pratchett anyway
If I were creating Pendraken I wouldn't mess about with Romans and  Mongols  I would have started with Centurions , eight o'clock, Day One!

ronan

09 March 2013, 05:02:58 PM #10
Quote from: FierceKitty on 09 March 2013, 02:51:33 PM
On the other hand, NEVER play the odds.(...) I speak from bitter and repeated personal experience. :'(

So we're using the same dice ?  ;D
( it became a kind of joke amongst my friends )

Last Hussar

09 March 2013, 06:51:42 PM #11
Quote from: Techno on 09 March 2013, 02:57:09 PM
;D ;D ;D

I'm the opposite.....

Four rolls with 2 X D10.
3 came up 00 = 100
1 came up 99 = 99.

Didn't 'arf do some damage. ;)....You don't forget things like that. ;D ;D ;D
Told you I was lucky !!
Cheers - Phil.

You should play Sunjester - It would be the first battle in history both sides would claim a pyrric victory, as both sides fight to the last man simultaneously.
I have neither the time nor the crayons to explain why you are wrong.

"The test of our progress is not whether we add more to the abundance of those who have much; it is whether we provide enough for those who have too little."
Franklin D. Roosevelt

GNU PTerry

goat major

09 March 2013, 07:00:14 PM #12
Always remember - dice are fiendishly clever and they hate us.
My blog: https://goatmajor.org.uk/
My twitting: http://twitter.com/goatmajor

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Hertsblue

09 March 2013, 10:36:52 PM #13
It's mutual.  >:(
When you realise we're all mad, life makes a lot more sense.

www.rulesdepot.net

Sean Clark

09 March 2013, 11:30:10 PM #14
Yes I tend to fail a 50:50 die roll around 90% of the time :-(
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https://godsownscale6mm.podbean.com/
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