## Give me an equation :D

- vxi
**Knight of the Hokey Pokey****Posts:**642**Joined:**Mon Aug 30, 2010 12:30 am**Location:**Ontario, Canada

### Give me an equation :D

Hey guys,

So, I've been interested in chances for just about my whole life. Mostly chances involving dice, because I'm getting more and more interested in board games and gambling, and that sort of thing. Just as a hobby, not as a job or anything like that.

Here's what I came up with while thinking about a 20 sided die:

(We'll call the final result r)

Roll the die once, check the number (We'll call this number a)

Roll the die a second time, check the number (Well call this number b)

If b ≥ a, r = b.

Else, r = a + b.

What I want from you guys is an equation that can give me the chance of every r (from 1 to 39) where I plug in 1-39 to get the chance (as a decimal).

Or you could just list out all of the chances, but that might take a little longer.

Also, I'd love it if you showed your work. It's always interesting to see how different people solve these problems.

Thanks for reading! ^_^

So, I've been interested in chances for just about my whole life. Mostly chances involving dice, because I'm getting more and more interested in board games and gambling, and that sort of thing. Just as a hobby, not as a job or anything like that.

Here's what I came up with while thinking about a 20 sided die:

(We'll call the final result r)

Roll the die once, check the number (We'll call this number a)

Roll the die a second time, check the number (Well call this number b)

If b ≥ a, r = b.

Else, r = a + b.

What I want from you guys is an equation that can give me the chance of every r (from 1 to 39) where I plug in 1-39 to get the chance (as a decimal).

Or you could just list out all of the chances, but that might take a little longer.

Also, I'd love it if you showed your work. It's always interesting to see how different people solve these problems.

Thanks for reading! ^_^

"And if you zoom in you can see they actually built something right there at the end of their travels. Awesome." -Avvatar

### Re: Give me an equation :D

I missed my physiology class and had to teach myself that equation and what everything meant.

NOW THAT'S AN EQUATION.

mbaxter wrote:Loaf was banned by rottencheeseCA for one minute, for reason "fuck"

Follow me on the twit:@ian7j2Canonuluvx wrote:This article is very well written Geese and ducks can be used very much.

- vxi
**Knight of the Hokey Pokey****Posts:**642**Joined:**Mon Aug 30, 2010 12:30 am**Location:**Ontario, Canada

### Re: Give me an equation :D

Wow. For some reason I figured people would be interested in helping me out with this ._.

"And if you zoom in you can see they actually built something right there at the end of their travels. Awesome." -Avvatar

### Re: Give me an equation :D

math is hard

Mozart, dope for the most part.

-Insane Clown Posee

I AM THE MOJOE!!!

-Insane Clown Posee

I AM THE MOJOE!!!

### Re: Give me an equation :D

f'(x) = lim (f(x+h)-f(x))/h = lim (sin(x+h)sin x)/h

Higher Mathematics Fuck yeah.

Higher Mathematics Fuck yeah.

Your lucky number is 559130229394580. Watch for it everywhere.

### Re: Give me an equation :D

decided to kill some time at work

the best i can figure it is

if r > 20

P(r) = (10-ceil(abs(21-r)/2))/400

if r ≤ 20

P(r) = (10-ceil(abs(21-r)/2) + r)/400

i didnt bother figuring out how to get rid of the conditional

the best i can figure it is

if r > 20

P(r) = (10-ceil(abs(21-r)/2))/400

if r ≤ 20

P(r) = (10-ceil(abs(21-r)/2) + r)/400

i didnt bother figuring out how to get rid of the conditional

If gay marriage becomes legal, are you worried that all of a sudden you'll start thinking about penis? "Oh shit. Gay marriage just passed. Gotta get me some of that hot dong action!" -Chris Kluwe on Emmett Burns

2014-02-28 17:25:33 RED *DEAD* Cursedbagel67 What, then ban me.

2014-02-28 17:25:44 BLU Cursedbagel67 Do it.

- vxi
**Knight of the Hokey Pokey****Posts:**642**Joined:**Mon Aug 30, 2010 12:30 am**Location:**Ontario, Canada

### Re: Give me an equation :D

Alright, so just to be sure, if I'm using 34 I'd do...

P(34) = (10-ceil(abs(21-34)/2))/400

P(34) = (10-ceil((13)/2))/400

P(34) = (10-7)/400

P(34) = 0.0075 or 0.75% chance

That looks pretty sound to me, if I did it right... I hope I did :P

Did I?

P(34) = (10-ceil(abs(21-34)/2))/400

P(34) = (10-ceil((13)/2))/400

P(34) = (10-7)/400

P(34) = 0.0075 or 0.75% chance

That looks pretty sound to me, if I did it right... I hope I did :P

Did I?

"And if you zoom in you can see they actually built something right there at the end of their travels. Awesome." -Avvatar

### Re: Give me an equation :D

as far as i can figure

yes

yes

If gay marriage becomes legal, are you worried that all of a sudden you'll start thinking about penis? "Oh shit. Gay marriage just passed. Gotta get me some of that hot dong action!" -Chris Kluwe on Emmett Burns

2014-02-28 17:25:33 RED *DEAD* Cursedbagel67 What, then ban me.

2014-02-28 17:25:44 BLU Cursedbagel67 Do it.

- vxi
**Knight of the Hokey Pokey****Posts:**642**Joined:**Mon Aug 30, 2010 12:30 am**Location:**Ontario, Canada

### Re: Give me an equation :D

Awesome.

If it works properly, thanks for the help.

I'll check later if all of the chances add up to 100%.

If it works properly, thanks for the help.

I'll check later if all of the chances add up to 100%.

### Re: Give me an equation :D

400 possible cases

210 if b ≥ a

190 if a > b

210 if b ≥ a

190 if a > b

If gay marriage becomes legal, are you worried that all of a sudden you'll start thinking about penis? "Oh shit. Gay marriage just passed. Gotta get me some of that hot dong action!" -Chris Kluwe on Emmett Burns

2014-02-28 17:25:33 RED *DEAD* Cursedbagel67 What, then ban me.

2014-02-28 17:25:44 BLU Cursedbagel67 Do it.

- TheKing
**Posts:**1109**Joined:**Fri Feb 22, 2008 1:42 pm**Location:**The recieving end of a pyro's flamethrower-
**Contact:**

### Re: Give me an equation :D

I work at a membrane caustic chemical plant with these chemical species. This made me smile.Ian7 wrote:

I missed my physiology class and had to teach myself that equation and what everything meant.

NOW THAT'S AN EQUATION.

edit: I also enjoyed taking A&P

### Re: Give me an equation :D

Funny part is, even though the Goldman equation was on his power-point he only wants us to know the Nerst equation.TheKing wrote:I work at a membrane caustic chemical plant with these chemical species. This made me smile.Ian7 wrote:

I missed my physiology class and had to teach myself that equation and what everything meant.

NOW THAT'S AN EQUATION.

edit: I also enjoyed taking A&P

FFFFUUUUUUUUUUUUUUUUUUUUUUU

mbaxter wrote:Loaf was banned by rottencheeseCA for one minute, for reason "fuck"

Follow me on the twit:@ian7j2Canonuluvx wrote:This article is very well written Geese and ducks can be used very much.

### Re: Give me an equation :D

2 + d = 10

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- DiabeticDugong
**Posts:**180**Joined:**Wed Jun 05, 2013 7:51 pm

### Re: Give me an equation :D

aaaaaannnddd its math well might as well to be true there was actually some one who made a small computer of some sort that will cheat/tell you where the ball will land ( by ball i am referring to the game where u have a spinning platform and you drop the ball in it and u bet where the ball will stop) the man tried it once and in las vagas and for most of the night and i worked. all he had to do was to put in the required information into the machine and it would tell him. Best part it fit in his ankle in order to hid it from the cops.