Answer:
A) If the reserve requirement is 10%:
- money multiplier = 1 / 10% = 10
- money supply = money multiplier x total reserves = 10 x $300 = $3,000
B) If the reserve requirement is 20%:
- money multiplier = 1 / 20% = 5
- money supply = money multiplier x total reserves = 5 x $300 = $1,500