2021 · Q61
A trader gives successive discounts of 20%, 10% and 5% respectively. What is the overall discount?
Elementary MathematicsPercentages
- A30%
- B31.6%
- C32.8%
- D35%
Explanation
Successive discounts multiply: price retained = 0.80 × 0.90 × 0.95 = 0.684. The overall discount is 1 − 0.684 = 0.316 = 31.6%. Hence option B. (Simply adding the discounts to 35% is the common trap.)