SOLUTION: What is the expected value of rolling a fair six-sided cube, with faces numbered 1 through 6, one time?
a. 1
b. 3
c. 3.5
d. 6
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Question 1180804: What is the expected value of rolling a fair six-sided cube, with faces numbered 1 through 6, one time?
a. 1
b. 3
c. 3.5
d. 6
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
Let be the random variable representing the result of the die roll. Recall that a die roll has the following outcomes:
Since the die is fair, each of these outcomes has a probability of .
The expected value is then the sum
answer: c.
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