Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 96,620

What part of the question? a, b?

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 15,937

a, for starters.

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 96,620

Know how to simulate or enumerate it?

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 15,937

I would try a simulation, but I'm on my phone. I do not have access to a CAS.

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 96,620

What do you want me to do then?

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 15,937

I was just asking if you've seen it and if you have any ideas for it...

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 96,620

I have not looked at it but first I would run a simulation. As soon as I write it of course.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 15,937

Hm, what name did he use for you in that pdf?

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 96,620

That is the name he took from the email I sent him!

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 15,937

How many email accounts do you have?

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 96,620

2 for everyday use. 1 for sites that I do not trust.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 15,937

Which one do you email me from? The last one?

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 96,620

One of them has no storage capability so I have clean out the spam frequently. I use the Lycos for you.

Simulation checks out his answer.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 15,937

bobbym wrote:

Know how to simulate or enumerate it?

How do I simulate it?

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 96,620

That quote was written over a thousand years ago, please refresh my memory.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 15,937

Drop dead, the game from the dice PDF. How do I simulate it?

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 96,620

```
s=0;
fubar[L_]:=Module[{s=0,ans=L},
While[ans!={},
ans = RandomChoice[{1,2,3,4,5,6},Length[ans]];
If[Count[ans,2|5]==0,s+=Total[ans],ans=DeleteCases[ans,2|5]];
];
s]
Table[fubar[ RandomChoice[{1,2,3,4,5,6},5]],{100000}]//Mean//N
```

16.08264

All indentations for readability taken out.

This is a really poor effort and you should avoid programming in this manner.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

Offline

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

Hi,

Using the technique from http://mathisfunforum.com/viewtopic.php … 63#p265663, we can utilize a table instead, since recursion in this case is prohibitive.

```
k = 3 # a face appears k times
n = 10
throws = [[[[[[0]*n for _ in xrange(n)] for _ in xrange(n)] for _ in xrange(n)] for _ in xrange(n)] for _ in xrange(n)] # a 6-dimensional list
for a in range(k+1):
for b in range(k+1):
for c in range(k+1):
for d in range(k+1):
for e in range(k+1):
for f in range(k+1):
if (a == 0 or b == 0 or c == 0 or d == 0 or e == 0 or f == 0):
throws[a][b][c][d][e][f] = 6*k - (a+b+c+d+e+f)
else:
throws[a][b][c][d][e][f] = float(throws[a-1][b][c][d][e][f]+throws[a][b-1][c][d][e][f]+throws[a][b][c-1][d][e][f]+throws[a][b][c][d-1][e][f]+throws[a][b][c][d][e-1][f]+throws[a][b][c][d][e][f-1])/6
print throws[k][k][k][k][k][k]
```

Perhaps we can solve more problems involving trees this way.

"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