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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,204

There are two boxes. Box I contains 5 red balls and 4 white balls. Box II contains 3 red balls and 6 white balls. A ball is taken randomly from box I and put into box II. Then, from box II, two balls are taken randomly. What is the probability of both balls taken from box II are red?

I only know that the probability of getting red ball from box I is

. How to do the rest?Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hi;

**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.**

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**thickhead****Member**- Registered: 2016-04-16
- Posts: 1,086

*Last edited by thickhead (2016-10-18 04:45:39)*

**{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha{Gods rejoice at those places where ladies are respected.}**

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**ElainaVW****Member**- Registered: 2013-04-29
- Posts: 580

Hello thickhead:

Too much notation for such a simple problem don't ya think? I thought there was a rule against just giving away the answer like that?

Give a guy a couple of fish and he's bloated for a day. Teach him how to fish and he can open a good seafood restaurant that bobbym can eat at.

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**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hi;

I do not eat seafood of any kind.

I thought there was a rule against just giving away the answer like that?

There has been much discussion about that particular point. I do not believe it is posted anywhere in the rules clearly. I would suggest not giving the full answer away but rather try to get the OP do it for himself. Help him along with hints and suggestions or show him a bit of math that can get the answer.

**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.**

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**ElainaVW****Member**- Registered: 2013-04-29
- Posts: 580

You do eat tuna don't you?

There has been much discussion about that particular point. I do not believe it is posted anywhere in the rules clearly. I would suggest not giving the full answer away but rather try to get the OP do it for himself. Help him along with hints and suggestions or show him a bit of math that can get the answer.

Is that an answer?

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**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hi;

You do eat tuna don't you?

I do. I am going to make some right now.

Is that an answer?

No it is not.

**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.**

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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,204

Thank you thickhead!

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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