Answer:
E(Y) = √a + √(a+12)
Step-by-step explanation:
X1 and X2 are independent variables while Y is the dependent variable, such that
Y = f(X1, X2)
Meaning Y is a function of X1 and X2
In this case,
Y = 2√X1X2
When (X1, X2) = (a, 1) ; Y = 2√a
When (X1, X2) = (a+12, 1) ; Y = 2√a+12
The expected value of Y is
[2√a + 2√a+12] ÷ 2 = √a + √a+12
