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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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#1 2012-11-22 13:35:51

jacks
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dice probability

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

#2 2012-11-22 21:02:01

bobbym
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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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#3 2012-11-25 14:19:41

jacks
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Re: dice probability

Thanks bobbym

would you like to explain it to me

#4 2012-11-25 14:38:04

bobbym
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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.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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