A random variable X has a distribution given by f(1)= 0.6,f(2)= 0.2,f(3)= 0.2.The mean of X is
A) 0.33.
B) 0.4.
C) 1.6.
D) 1.8.
E) 3.

Question

Quizplus · Accepted Answer

The mean of a discrete random variable can be calculated as the weighted average of its possible values, where the weights are given by their respective probabilities.

In this case, we have:

mean(X) = 1*0.6 + 2*0.2 + 3*0.2 = 1.6

Therefore, the best choice is C), based on the calculation of the expected value of X.

A Random Variable X Has a Distribution Given by F(1)=