Records kept by the chief dietitian at the university cafeteria over a 30-wk period show the following weekly consumption of milk (in gallons).
a. Find the average number of gallons of milk consumed per week in the cafeteria.
b. Let the random variable X denote the number of gallons of milk consumed in a week at the cafeteria. Find the probability distribution of the random variable X and compute E(X), the expected value of X.