Even number = that number is added to your score

Odd number = that number subtracted from your score

What is the expected value of a single roll of the die, and how is it calculated?

Printable View

- Jul 18th 2006, 08:17 PMzosoroll of the die
Even number = that number is added to your score

Odd number = that number subtracted from your score

What is the expected value of a single roll of the die, and how is it calculated? - Jul 18th 2006, 08:25 PMQuickQuote:

Originally Posted by**zoso**

I'll show you...

note: $\displaystyle s_1$ is the amount of points you'll get when you roll a 1

average is:

$\displaystyle \frac{s_1+s_2+s_3+s_4+s_5+s_6}{6}=\frac{\neg1+2-3+4-5+6}{6}=\frac{3}{6}=\boxed{\frac{1}{2}}$

and that is the expected outcome for a single roll of the die. Yes I know it's impossible to get that number with a die, but that's the best math has to offer. - Jul 18th 2006, 08:26 PMmalaygoelQuote:

Originally Posted by**zoso**

Malay - Jul 18th 2006, 08:31 PMQuickQuote:

Originally Posted by**malaygoel**

- Jul 18th 2006, 08:40 PMmalaygoelQuote:

Originally Posted by**Quick**

Hence expected value=$\displaystyle \frac{1}{6}.1 + \frac{1}{6}.2 + \frac{1}{6}.3 + \frac{1}{6}.4 + \frac{1}{6}.5 + \frac{1}{6}.6$

Malay - Jul 18th 2006, 08:41 PMzosoQuote:

Originally Posted by**Quick**

- Jul 18th 2006, 08:43 PMQuickQuote:

Originally Posted by**malaygoel**

- Jul 18th 2006, 08:46 PMmalaygoelQuote:

Originally Posted by**Quick**

Yes, if it is to be subtracted. then the answer is 0.5.

Malay - Jul 18th 2006, 08:48 PMmalaygoelQuote:

Originally Posted by**zoso**

Extend it.

Try for double throw of dice.

Malay