Answer:
3%
Step-by-step explanation:
Increase in money supply ($ billion) = Increase in reserves / Reserve ratio
Increase in money supply ($ billion) = 150 / 0.1
Increase in money supply ($ billion) = 1,500
Increase in price level = (Increase in money supply / 100) * 0.2
Increase in price level = (1,500/100) * 0.2
Increase in price level = 3%