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A bill for ₹3,000 due 6 months hence is discounted at 8% per annum. What is the banker’s discount?

  • A.₹120
  • B.₹115.38
  • C.₹124
  • D.₹110

Answer: C

Correct answer: ₹120

The banker’s discount is simple interest on the face value for the unexpired period: \[ \text{BD} = \frac{3000 \times 8 \times \tfrac{1}{2}}{100} = \frac{12000}{100} = 120. \] The banker hands over \( 3000 - 120 = 2880 \), which is the discounted value of the bill, and collects the full 3,000 at maturity. The mathematically fair charge would be the true discount, \[ \text{TD} = \frac{3000 \times 4}{104} \approx 115.38, \] which is the second option - and the difference of about 4.62 is the banker’s gain, the banker’s profit on the transaction. That gap is the whole point of the topic: a banker charges interest on the amount that will be received rather than on the amount actually advanced, and so always gains a little.

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