Question

If a pair of die are rolled, what is the expected value of the sum of the rolls?

Answer 1

Each die is independent , so the sum is the expected value of each separate die.

Explanation:

Each die has an expected value equal to:

E(X) `=(1+2+3+4+5+6)/6=3.5`

Expected value of sum `= 3.5 + 3.5=7`

hope that helped