Profit and Loss – Successive discounts on a printed price (again): An electric heater has a printed price of Rs 160. If two successive discounts of 20% and 10% are given, how much does the buyer pay?

Introduction / Context:
As before, successive discounts must be applied multiplicatively. The second discount applies to the already reduced price, not the original printed price.

Given Data / Assumptions:

• Printed price = Rs 160
• Discounts = 20% then 10%

Concept / Approach:
First reduce by 20% to get an intermediate price, then reduce the intermediate by 10% to get the final payable amount.

Step-by-Step Solution:
After 20%: 160 * 0.80 = 128After additional 10%: 128 * 0.90 = 115.20

Verification / Alternative check:
Combined factor = 0.80 * 0.90 = 0.72 ⇒ 160 * 0.72 = 115.20.

Why Other Options Are Wrong:
129.60 and 119.60 use an incorrect factor; 112.00 or 108.80 are too low.

Common Pitfalls:
Adding the percentages to claim a single 30% discount.

Final Answer:
Rs 115.20