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Sixty-eight people are sitting in 20 cars and each car contains at most 4 people. What is the maximum possible number of cars that could contain exactly 1 of the 68 people.
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当前版本由 197202qt 更新于2023-08-14 17:45:23 感谢由 197202qt 对此题目的解答所做出的贡献。
4x+y=68，x+y=20
解出X=16，Y=4
当前版本由 177899d 更新于2022-01-26 16:50:39 感谢由 177899d 对此题目的解答所做出的贡献。
设载1人的车有x辆。
x+4(20-x)=68
3x=12
x=4
所以载1人的车最多4辆。
当前版本由 昵称吧 更新于2018-05-08 17:35:08 感谢由 昵称吧 对此题目的解答所做出的贡献。
C
68÷4=17
4x16+4x1=68
装 1 人的车最多 4 辆
题目讨论
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GRE重点脱贫对象
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今天也刷题
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对嘛这才叫解析
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一
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不一定正好四人坐满啊
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这剩下的可能有一车三人或俩人情况
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ok
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所以人家问的是最多有多少辆车只坐一个人
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218921qpn
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rainbow哇
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为啥不是18-20姐妹 我sb了
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对呀？为什么呀我也想不明白
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因为17号车变成1人了
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68/4=17 全部4人一车坐满可以坐17辆车 空了3辆 这时候很容易误解从18-20是一个人而误选B 但是我们要使一车一人最大化 那么就是从一组4人的车辆中分出4个人一人坐一辆 分出3人坐空的那3辆 被分的那一组还正好剩下1人 所以最多有4辆车只坐1人
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276885hfspd
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是的题还全是免费的，相见恨晚呐
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