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标题: OG 11th 第200题 [打印本页]

作者: barmecider 时间: 2008-2-27 17:47 标题: OG 11th 第200题

A store currently charges the same price for each towel that it sells. If the current price of each towel were to be increased by $1, 10 fewer of the towels could be bought for $120, excluding sales tax. What is the current price of each towel?

Answer: $3

10 fewer of the towels could be bought for $120,啥意思啊？大虾赐教

作者: barmecider 时间: 2008-2-28 07:00

got u!

so thanks

作者: WalkByFaith 时间: 2008-2-28 19:34

"10 fewer of the towels could be bought for $120"好像没有暗示说按原价格卖，收入也是120元；这个重要的条件是怎么看出来的？

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