Answer:
Reserve ratio = 31.11%
Currency drain ratio = 13.33%.
Step-by-step explanation:
Reserve ratio = Reserves/Deposits = $280/$900 = 0.3111, or 31.11%
Currency drain ratio = Currency/Deposits = $120/$900 = 0.1333, or 13.33%
Therefore, reserve ratio is 31.11%, and currency drain ratio is 13.33%.