The velocity of money is 3.
The quantity theory of money is an economy theory that arose in the 16th century. It is an idea of monetary economists. The quantity theory of money states that the price of goods and services in an economy is directly proportional to the money supply.
Quantity theory of money = price x real output = money supply x velocity
Velocity = ( price x real output / money supply)
(1.2 x 100 billion) / 40 billion = 3
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