Lesson eLearning

Total reserves of commercial banks are Rs. 2,00,000. The required reserve ratio is 10%. The RBI conducts an open‑market sale of government securities worth Rs. 20,000 to these banks. Assuming banks lend out all excess reserves, calculate the net change in the money supply after the multiplier effect.

medium 2 marks Class 10 · Economics · Money and Credit
Answer
The money supply will fall by Rs. 2,00,000.

The correct answer is The money supply will fall by Rs. 2,00,000. — State that the money supply decreases by Rs. 2,00,000 as a result of the open‑market operation.

Step-by-step solution

  1. Calculate the money multiplier as the reciprocal of the required reserve ratio: multiplier = 1 / 0.10 = 10.
  2. Determine the change in reserves caused by the RBI's sale: banks pay Rs. 20,000, so ΔR = –20,000.
  3. Apply the multiplier to the change in reserves: ΔM = multiplier × ΔR = 10 × (–20,000) = –2,00,000.
  4. State that the money supply decreases by Rs. 2,00,000 as a result of the open‑market operation.
Common mistake: Using the total reserve amount instead of the change in reserves, leading to an incorrect magnitude of change.

Concept tested: Money multiplier and open market operation

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