Thread: K-Sided Dice

Hi everyone,

Looking for a bit of help. If i throw a k-sided dice twice, what is the expected value of their sums. I'm looking for a formula for it including k.

Thanks

Originally Posted by waxandshine

Hi everyone,

Looking for a bit of help. If i throw a k-sided dice twice, what is the expected value of their sums. I'm looking for a formula for it including k.

Thanks

The expected value of the sum of two RV's is the sum of their expected values.

So what is the expected value of a single throw of a k-sided die.

CB

well yeah, but there's no values so it's basically the expected value of one roll times two, but i dont know hot to write a formula for the expected value of one roll

Originally Posted by waxandshine

well yeah, but there's no values so it's basically the expected value of one roll times two, but i dont know hot to write a formula for the expected value of one roll

Fair die so probability of each face is 1/k.

So expected value is:



CB