单选题
A shoe store charges $39 for a pair of a certain type of sneaker. This price is 30% more than the amount it costs the shoe store to buy one pair of these sneakers. A sales associate can purchase a pair of these sneakers at 20% off the store's cost. How much would an associate pay for a pair of these sneakers (excluding sales tax)?
- A. $31.20
- B. $25.00
- C. $24.00
- D. $21.84
- E. $19.50
【正确答案】
C
【答案解析】First recognize that $39 is 30% more than the cost of the sneakers for the store. This can be represented as 130%, or 1.3. Therefore, the store pays $39/1.3, or $30 for a pair of sneakers. A sales associate pays 80% of this price: $30(0.8)=$24.