Question

The distribution of a discrete random variable X is given below:
X 14 5 8 --------
P(X = x) 0.3 0.4 0.25

What is the expectation of the random variable Y = 3X + 4?​

Answer 1

Answer:

if X=x

then Y= 3X+4 will be

Y= (3*0.3)+4

Y= 0.9+4

Y= 4.9