finite math

Question

x is a binomial random variable with n=400 and p=.52. Find the expected value of x (the mean)

Answer 1

Hello, thank you for taking the time to post your question!

In order to find the expected value in this scenario you want to multiply the “n” and “p” values together.

When I do that I get

400 x 0.52 = 208

So the expected value of this binomial random variable is 208

I hope that helps get you moving in the right direction! Feel free to reach out if you have any additional questions beyond that :)

Answer 2

Mean=n.p=400x0.52=208