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## #126 2013-12-06 01:50:36

gAr
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### Re: Probability problem.

Hi anonimnystefy,

Hi bobbym,

Okay.

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #127 2013-12-06 02:30:06

anonimnystefy
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### Re: Probability problem.

Hi gAr

Last edited by anonimnystefy (2013-12-06 02:33:13)

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #128 2013-12-06 02:48:02

gAr
Star Member

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### Re: Probability problem.

Hi anonimnystefy,

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #129 2013-12-06 03:12:42

anonimnystefy
Real Member

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### Re: Probability problem.

Hm, I have found one mistake and simplified the code, but now I am getting

.

Last edited by anonimnystefy (2013-12-06 03:28:24)

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #130 2013-12-06 03:14:40

bobbym

Online

### Re: Probability problem.

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.

## #131 2013-12-06 04:02:20

gAr
Star Member

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### Re: Probability problem.

Hi,

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #132 2013-12-06 04:10:09

anonimnystefy
Real Member

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### Re: Probability problem.

Hi gAr

I am really starting to believe that 1) is pi-2.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #133 2013-12-06 04:11:07

bobbym

Online

### Re: Probability problem.

Hi;

I do not think that is correct. It is too high.

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.

## #134 2013-12-06 04:16:06

anonimnystefy
Real Member

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### Re: Probability problem.

It is not. It is equal to 1.141592... which is close to what I am getting with the code above.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #135 2013-12-06 04:16:08

gAr
Star Member

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### Re: Probability problem.

Hi anonimnystefy,

Hi bobbym,

Yes, it is.

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #136 2013-12-06 04:20:05

bobbym

Online

### Re: Probability problem.

Hi gAr;

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.

## #137 2013-12-06 04:29:36

gAr
Star Member

Offline

### Re: Probability problem.

Hi bobbym,

Okay.

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #138 2013-12-06 04:49:35

bobbym

Online

### Re: Probability problem.

Hi gAr;

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.

## #139 2013-12-06 04:58:49

gAr
Star Member

Offline

### Re: Probability problem.

Hi bobbym,

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #140 2013-12-06 05:03:50

anonimnystefy
Real Member

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### Re: Probability problem.

Hi gAr

You were right! I got 4/pi.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #141 2013-12-06 05:04:26

bobbym

Online

### Re: Probability problem.

Hi gAr;

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.

## #142 2013-12-06 05:13:23

gAr
Star Member

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### Re: Probability problem.

Hi bobbym,

I'm posting a screenshot to tell what I mean.

Hi anonimnystefy,

That is still more!
The answers have 1/pi times another fraction a/b, with a and b != 1

Logging out now, see you "tomorrow".

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #143 2013-12-06 05:24:04

anonimnystefy
Real Member

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### Re: Probability problem.

Hi guys

This is what I am doing so far:

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #144 2013-12-06 05:24:27

bobbym

Online

### Re: Probability problem.

Hi gAr;

Thanks and see you tomorrow!

Hi anonimnystefy;

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.

## #145 2013-12-06 05:32:04

anonimnystefy
Real Member

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### Re: Probability problem.

#### Code:

`Total[Table[2/Sqrt[1 + #^2] &[Tan[RandomReal[2 Pi]]], {1000000}]]/1000000`

This is basically my code. It gives an answer close to 4/Pi.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #146 2013-12-06 05:39:55

bobbym

Online

### Re: Probability problem.

Hi gAr;

Hi anonimnystefy:

If you set this problem up in geogebra where you can actually see what is occurring you will see that gAr is right.

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.

## #147 2013-12-06 19:02:03

gAr
Star Member

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### Re: Probability problem.

Hi anonimnystefy,

I think you misunderstood the problem. P is a point inside the circle, and we need the average length of P to Q on the circumference.

Hi bobbym,

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #148 2013-12-06 22:43:59

bobbym

Online

### Re: Probability problem.

Hi gAr;

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.

## #149 2013-12-06 23:09:30

gAr
Star Member

Offline

### Re: Probability problem.

Hi bobbym,

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #150 2013-12-06 23:14:13

bobbym

Online

### Re: Probability problem.

Hi;

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.