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#1 2012-11-21 14:35:51

jacks
Member
Registered: 2012-11-21
Posts: 80

dice probability

A six faced fair dice is thrown until 1 comes, then the probability that 1 comes in even no. of trials is

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#2 2012-11-21 22:02:01

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,636

Re: dice probability

Hi jacks;

I am getting

So the probability is 5 / 11.

This agrees with computer simulations.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#3 2012-11-24 15:19:41

jacks
Member
Registered: 2012-11-21
Posts: 80

Re: dice probability

Thanks bobbym

would you like to explain it to me

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#4 2012-11-24 15:38:04

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,636

Re: dice probability

Hi;

It is based on a tree and trick for summing series like that. What part do you need help on?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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