Answer:
$9 billion
Explanation:
Calculation to determine what The commercial banking system has excess reserves of
Using this formula
Excess Reserve= Net Worth Reserves -Required reserve
Let plug in the formula
Excess Reserve=$51 billion - (.30*$140 billion)
Excess Reserve=$51 billion-$42 billion
Excess Reserve=$9 billion
Therefore The commercial banking system has excess reserves of $9 billion