Description : Which of the following series of discounts is the best for a customer? (A) Successive discounts of 10% ,20%,30% (B) Successive discounts of 20%,20%,20% (C) Successive discounts of 15%,15%,15%,15% (D) Successive discounts of 20%,40% a) A b) B c) C d) D e) A and B
Last Answer : consider the price as 100 A = 100 × 0.9 × 0.8 × 0.7 =50.4 B = 100 × 0.8 × 0.8 × 0.8=51.2 C = 100 × 0.85 × 0.85 × 0.85 ×0.85 ~ =52.2 D = 100 × 0.8 × 0.6 =48 We see that the maximum discount of 52% (100-48) is on D, which is the best for a customer. Answer : d