SOLUTION: Suppose that the number of dice thrown is a binomial random variable with n = 17 and p = 0.31. What is the expected number of spots showing on the thrown dice?

Question 1200714: Suppose that the number of dice thrown is a binomial random variable with n = 17 and p = 0.31. What is the expected number of spots showing on the thrown dice?
Found 2 solutions by math_tutor2020, ikleyn:
Answer by math_tutor2020(3816) (Show Source): You can put this solution on YOUR website!

Answer: 5.27

Work Shown:
E[X] = n*p
E[X] = 17*0.31
E[X] = 5.27

Further Reading:
https://online.stat.psu.edu/stat500/lesson/3/3.2/3.2.2
and
https://stats.libretexts.org/Bookshelves/Introductory_Statistics/Book%3A_Introductory_Statistics_(Shafer_and_Zhang)/04%3A_Discrete_Random_Variables/4.03%3A_The_Binomial_Distribution

Answer by ikleyn(52776) (Show Source): You can put this solution on YOUR website!
.

Is it a kind of joke ?

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