The accompanying table gives data for a commercial bank or thrift. when the legal reserve ratio is 30 percent, the monetary multiplier is multiple choice 4. 3.33. 5. 2.5.

The monetary multiplier is the maximum amount the money supply which could be increased based on the increase in Banking system's reserve.
The formula for monetary multiplier is:
1/ Legal reserve ratio

So, Monetary multiplier:
1/30%     =>  100/30  => 3.33

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