Question

Suppose that the number of dice thrown is a binomial random variable with n = 10 and p = 0.86. What is the expected number of spots showing on the thrown dice?

Answer 1

The expected number of spots showing on the thrown dice is 30.

Explanation:

np = 10(0.86) = 8.6

The expected number of spots on any one die is

3.5

So therefore the value of the total number of spots on the thrown dice is (10)(0.86)(3.5) =30.1 30