Answer:
Money multiplier for this economy is 5
Explanation:
Initial bank reserves = reserve deposit ratio * $500 = 0.2 * $500 = $100
1) increase in bank reserves by $1 , bank reserve deposit increases from $500 to $101 / 0.2 = $505 and the money supply increases by $505 - $500 = $5
2) increase in bank reserves by $5 , bank reserve deposit increases from $500 to $105 / 0.2 = $525 and the money supply increases by $525 - $500 = $25
3) increase in bank reserves by $10 , bank reserve deposit increases from $500 to $110 / 0.2 = $550 and the money supply increases by $550 - $500 = $50
as money supply rises by 5 times the increase in bank reserves , the money multiplier in this economy is 5.