A coin-operated coffee vending machine dispenses, on the average, 6 oz of coffee per cup. Can this statement be true of a vending machine that occasionally dispenses only enough to fill the cup half full (say, 4 oz)? Explain
a. No, this is not possible.
b.Yes, it could fill 4 cups of 4 oz and 1 cup of 8 oz.
c.Yes, it could fill 4 cups of 6.5 oz and 1 cup of 4 oz. d.none of the above