f X and Y are two independent random variable, E(XY)=10 and E(X)= 4, t

1.	f X and Y are two independent random variable, E(XY)=10 and E(X)= 4, then what is the value of E(Y)?
Answer» We know for any two independent random variables: E(XY) = E(X)E(Y); 10 = 4 E(Y); E(Y)= 10/4 = 2.5

f X and Y are two independent random variable, E(XY)=10 and E(X)= 4, then what is the value of E(Y)?

Answer»

We know for any two independent random variables:

E(XY) = E(X)E(Y);

10 = 4 E(Y); E(Y)= 10/4 = 2.5