You have two 8 oz. cups in front of you. One is filled with Root Beer and one is full of Club Soda. You take one tablespoonful of Root Beer and pour it into the Club Soda. Stir well. Now, you take a tablespoonful of the mixture you just stirred, and pour it into the Root Beer. Now, does the Root Beer have more Club Soda in it or vice versa? Don’t account for spilling.
Answer
They are equal. For every drop of club soda in the root beer, there is a drop of root beer in the club soda.
