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## #51 2013-09-25 17:28:03

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

Fourth way by programming,
J code:

``````a=:i.1000
+/+/(+/"1(3#10)#:a)=/+/"1(3#10)#:a``````

We can shorten that a little:

``+/+/=/~+/"1(3#10)#:a``

Last edited by gAr (2013-09-25 19:30:02)

"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."

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## #52 2013-11-19 21:45:33

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

New problem:

A fair coin is tossed 20 times. What is the probability that there will be 5 or more consecutive heads?

Last edited by gAr (2013-11-24 02:45:44)

"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."

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## #53 2013-11-20 02:05:49

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

Hi gAr;

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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## #54 2013-11-20 02:42:51

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### 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."

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## #55 2013-11-20 02:48:09

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

Hi gAr;

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Offline

## #56 2013-11-20 02:53:01

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

"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."

Offline

## #57 2013-11-20 02:57:38

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

Hi gAr;

Trying to convince Agnishom to do some computer math.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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## #58 2013-11-20 03:03:02

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

That's nice, I think he's already doing some.

"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."

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## #59 2013-11-20 03:05:24

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

Yes, some of my bad influence rubs off on most people sooner or later.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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## #60 2013-11-20 03:24:53

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

I ask people to stay away from non-free softwares, but most of them are reluctant to learn!

"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."

Offline

## #61 2013-11-20 03:28:56

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

Have you been keeping up with geogebra? They are almost done with it. Do you like the 3D?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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## #62 2013-11-20 03:55:19

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

Haven't used the recent releases.
Last time when I used 3D, processor was running at 100% even when left idle, don't know now.
Any significant changes you observed?

"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."

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## #63 2013-11-20 03:58:52

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

I am not a big fan of 3D programs to begin with. I prefer living like a flatlander. I think they have come along alot but still need more work.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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## #64 2013-11-20 04:06:31

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

Me neither.

"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."

Offline

## #65 2013-11-20 04:12:02

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

I thought it was a little slow on my machine but it is only a dual core.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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## #66 2013-11-20 05:33:29

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

Even mine is a dual core, but I think it doesn't matter for most of the applications.

"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."

Offline

## #67 2013-11-20 05:50:43

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

Also, my graphics card is the low end one.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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## #68 2013-11-20 16:35:28

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

That's fine, CAS wouldn't require a graphics card. Though I think I've read recent mathematica versions make use of it.

"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."

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## #69 2013-11-20 16:37:11

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

Yes, they use the Nvidia Cuda card. It speeds up things tremendously, I have a Radeon card.

Graphics are important when plotting 3D especially.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Offline

## #70 2013-11-20 16:45:13

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

Yes, that's right.

"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."

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## #71 2013-11-20 16:47:11

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

Not that I do alot of 3D work. I do not think there is any CAS that is as good as some other programs are at graphing.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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## #72 2013-11-20 16:57:37

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

I too rarely use 3d, and I recently saw that there's an option to view the plot in stereographic view in sage. But didn't try with the glasses yet.

"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."

Offline

## #73 2013-11-20 16:59:42

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

What kind of glasses do you use for it?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Offline

## #74 2013-11-20 17:13:17

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Probability problem.

The red and cyan glasses, like the ones used for viewing 3d films.

By the way, is it feasible to create an option to mark the posts containing problems, and then create the links to those posts in one place (e.g. in the beginning of the thread)?
That will make the problems more visible.

Last edited by gAr (2013-11-20 17:26:04)

"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."

Offline

## #75 2013-11-20 21:30:50

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 106,389

### Re: Probability problem.

Hi;

I am not able to do that. It would have to be done with source code of the forum.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Offline