Question 7. X is distributed as follows: P(X=1}= 0.3 , P{X=2)= 0.5 , P(X=3}= 0.2 Evaluate (as a number) the expectation and variance of 60/X X 1 2 3 Probability 0.3 0.5 0.2 60/X 60 30 20 Y is distributed the same way as X, and X and Y are independent. Evaluate (as a number) the expectation and variance of (a) 60/X + 30/Y ( b ) 60/X + 30/X (Look carefully to see which are Y's and which are X's.)