a. Recalling the definition of 2 for a single rv X, write a formula that would be

a. Recalling the definition of σ2 for a single rv X, write a formula that would be appropriate for computing the variance of a function h(X, Y) of two random variables.
b. Use this formula to compute the variance of the recorded score h(X, Y) [= max(X, Y)] in part (b) of Exercise 22.