Math Is Fun Forum

jacks

Member

Registered: 2012-11-21

Posts: 132

dice probability

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: dice probability

Hi jacks;

I am getting

So the probability is 5 / 11.

This agrees with computer simulations.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

jacks

Member

Registered: 2012-11-21

Posts: 132

Re: dice probability

Thanks bobbym

would you like to explain it to me

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: dice probability

Hi;

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

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.