Suppose that visits are made to the drive-in bank with the distribution of the number of cars in line given by f(x) = 1/10, x = 1, 2, .•• , 10. (a) What is the variance of the number of cars (b) What...

Suppose that visits are made to the drive-in bank with the distribution of the number of cars in line given by f(x) = 1/10,

x = 1, 2, .•• , 10.

(a) What is the variance of the number of cars

(b) What is the expected total number of cars

two visits and in k visits?