QUESTION 10 2 points Save Answer A random variable X can take on the values -2, 2 and 6 with probabilities 0.3, 0.3 and 0.4 respectively. That is P(X=-2) = 0.3, P(X=2) = 0.3 and P(X=6) = 0.4. Calculate E(X) (correct to 1dp) QUESTION 11 2 points Save Answer If X and Y are two random variables with E(X) = 10, Var(X) = 5, E(Y) = 20, Var(Y) = 10 and E(XY) = 205, then calculate Cov(X, Y). O a. -155 O b. 155 O c. 5 O d. -5