Ans.Correct Option is rises by $1200 billion
At 10% reserves were at 100 billion
So , at 5% means that reserve will get hallfed and will be at 50 billion.
Reserve Ratio = 5% or 0.05
Multiplier = 1 / 0 .05 = 20
Money supply = 50 x 20 = $1000 billion
Additional bond bought at 10 billion -
Money supply = 10 x 20 = $200 billion
Increase in Money Supply = 1000 + 200 = $1200 billion.
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