Odds of rolling doubles or better on 3d6?

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Odds of rolling doubles or better on 3d6?

Postby mrfusion » Thu Dec 10, 2009 8:35 am

What is the percent probability of rolling doubles or better on 3d6?
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Postby Brokensoul » Thu Dec 10, 2009 9:08 am

What is the probability of rolling doubles on 3d6?

5/36 + 5/36 + 5/36 = 15/36 (41.66%)

But only some of the time will number you roll succeed. Like if you roll double 1's and a 3 and get a total of 5.
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Probabilities

Postby jstark » Thu Dec 10, 2009 11:07 am

Actually, the probabilities of rolling doubles or better (triples) is 44.4%.
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Postby Brokensoul » Thu Dec 10, 2009 11:15 am

Dooohh!!!

I forgot to account for triples.
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Postby Walky » Thu Dec 10, 2009 11:26 am

Easier way to calculate it: How big is the chances that all three dices are different?

(roll the first dice. The second has 5/6 to get a different result. The third has 4/6 to get another result)

--> 1 * 5/6 * 4/6 = 55.6%

Chances that this isn't so:

--> 1 - 55.6% = 44.4%
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Postby Brokensoul » Thu Dec 10, 2009 11:59 am

I was googling 3d6 and found this game of chance called Cee-lo here is a link to wikipedia about it.

http://en.wikipedia.org/wiki/Cee-lo

I know it has nothing to do with this topic, but I thought I might be cool to include this as a popular game to be played in the setting at bars and taverns, since you know it uses the 3d6 that are right in front of you. Maybe I will make this the official craps game of my Dragon Age game.
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Postby mrfusion » Thu Dec 10, 2009 3:05 pm

Thanks folks!
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