Assuming there are no excess reserves,if the banks increase the desired reserve ratio from 10 percent to 20 percent,the money multiplier

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The money multiplier is equal to 1/reserve ratio. If the reserve ratio increases from 10 percent to 20 percent, the money multiplier decreases from 10 to 5. This is because banks are able to lend out less of their deposits, resulting in a smaller increase in the money supply for a given increase in reserves.

Assuming There Are No Excess Reserves,if the Banks Increase the Desired