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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
Room prices are regularly $ 100, but for each additional room rented by a group, the price is reduced by $ 3 for each room. For
admin
2012-05-29
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 x $97 =$ 194, 3 rooms cost 3 x $ 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间房子的房租为6×[100—3×(6—1)]=510。
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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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