Consider the following scenario: In the last year, your hospital reported that approximately 18% of admitted patients were uninsured. Let X = number of patients (out of three patients) in the sample that are uninsured. This is a binomial problem. X is distributed B(n=3,p=0.18).

Find the expected value of X (= mu_x). This value is also referred to as the "mean of X" or the "mean of the discrete random variable X."