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Room prices are regularly $ 100, but for each additional room rented by a group, the price is reduced by $3 for each room. For e
Room prices are regularly $ 100, but for each additional room rented by a group, the price is reduced by $3 for each room. For e
admin
2011-03-05
39
问题
Room prices are regularly $ 100, but for each additional room rented by a group, the price is reduced by $3 for each room. For example, 1 room costs $100, 2 rooms cost 2 × $97 = $ 194, 3 rooms cost 3 ×$ 94 = $282, and so on. What is the total cost of renting 6 rooms?
选项
答案
$510
解析
由题干中的例子类推可知租六问房子的房租为6×[100-3×(6-1)]=510。
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本试题收录于:
A类竞赛(研究生)题库大学生英语竞赛(NECCS)分类
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A类竞赛(研究生)
大学生英语竞赛(NECCS)
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