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#26 2013-07-02 05:20:55

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 16,816
Website

Re: Glamor Geometric Series

Consider that the 4th person chose dish X.

The Probability that the 1st Person chose dish X is 1/5.
The Probability that the 2nd Person chose dish X is 1/5.
The Probability that the 3rd Person chose dish X is 1/5.
Therefore, the probability that anyone has chosen X before is 3/5.

So, the possibility that the dish is previously not chosen is 2/5


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Humanity is still kept intact. It remains within.' -Alokananda

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#27 2013-07-02 05:22:01

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,676

Re: Glamor Geometric Series

Is that the exact question?


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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#28 2013-07-02 05:29:33

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 16,816
Website

Re: Glamor Geometric Series

I would say yes, because the answer you gave me works


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Humanity is still kept intact. It remains within.' -Alokananda

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#29 2013-07-02 05:32:26

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,393

Re: Glamor Geometric Series

Agnishom wrote:

The Probability that the 1st Person chose dish X is 1/5.
The Probability that the 2nd Person chose dish X is 1/5.
The Probability that the 3rd Person chose dish X is 1/5.
Therefore, the probability that anyone has chosen X before is 3/5.

That method is faulty.  If there were 5 people before D, you would end up with 5/5 and no chance for D.

I'll work on an analytic method.

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#30 2013-07-02 05:33:21

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,676

Re: Glamor Geometric Series

Must be different for me and you then. Mine requests a + b in a / b.


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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#31 2013-07-02 05:35:49

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 16,816
Website

Re: Glamor Geometric Series

bob bundy wrote:
Agnishom wrote:

The Probability that the 1st Person chose dish X is 1/5.
The Probability that the 2nd Person chose dish X is 1/5.
The Probability that the 3rd Person chose dish X is 1/5.
Therefore, the probability that anyone has chosen X before is 3/5.

That method is faulty.  If there were 5 people before D, you would end up with 5/5 and no chance for D.

I'll work on an analytic method.

Bob

Ya,  so... What to do? sad roll

Hi bobbym,

They ask me for a + b too


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Humanity is still kept intact. It remains within.' -Alokananda

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#32 2013-07-02 05:37:10

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,676

Re: Glamor Geometric Series

You can not add them up.


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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#33 2013-07-02 05:42:11

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 16,816
Website

Re: Glamor Geometric Series

Then?


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Humanity is still kept intact. It remains within.' -Alokananda

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#34 2013-07-02 07:15:27

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,676

Re: Glamor Geometric Series


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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#35 2013-07-02 07:52:10

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,393

Re: Glamor Geometric Series

hi

I get that too by my own method and a general formula too.  smile

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#36 2013-07-02 14:03:53

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 16,816
Website

Re: Glamor Geometric Series

THanks roflol


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Humanity is still kept intact. It remains within.' -Alokananda

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