A merchant paid $300 for a shipment of x identical calculators. The merchant used 2 of the calculators as demonstrators and sold each of the others for $5 more than the average (arithmetic mean) cost of the x calculators. If the total revenue from the sale of the calculators was $120 more than the cost of the shipment, haw many calculators were in the shipment?
“$5 more than the average (arithmetic mean) cost of the x calculators”this sentence does not indicate that the cost is only the shipment.....作者: 猫猫头 时间: 2002-11-18 23:37
请看：题干：a shipment of x identical calculators
问题：$5 more than the average (arithmetic mean) cost of the x calculators。
因此，可以肯定地说indicate that the cost is only the shipment作者: samgxs 时间: 2002-11-18 23:40
