The Mean of a Discrete Random Variable X

Multiple Choice

The mean of a discrete random variable x:

A) is denoted by
B) is denoted by E(x) , because it is the value of x one can expect to find on average by numerous repetitions of the random experiment that generates the variable's actual values
C) is correctly described by both "is denoted by" and "is denoted by E(x) , because it is the value of x one can expect to find on average by numerous repetitions of the random experiment that generates the variable's actual values"
D) is always = 0
E) is none of these