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【OG20-P172-167题】
Four extra-large sandwiches of exactly the same size were ordered for m students, where m > 4. Three of the sandwiches were evenly divided among the students. Since 4 students did not want any of the fourth sandwich, it was evenly divided among the remaining students. If Carol ate one piece from each of the four sandwiches, the amount of sandwich that she ate would be what fraction of a whole extra-large sandwich?
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题目:已知4个超大号三明治尺寸完全相同,将它们分给m个学生,m大于4。其中三个被所有学生平分。由于有4个学生不想要第四个,它就被剩下的学生平分。假设这四个三明治中,Carol每个都吃了一片,那么她所吃的分量占一个三明治的比例是多少。
解:Carol吃了前三个,对应比例为3/m, 第四个也吃了,对应比例为1/(m-4),因此Carol吃的三明治占整个三明治的比例为3/m+1/(m-4)=(4m-12)/[m(m-4)]
题目讨论 (8条评论)

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365962xlv
我对三明治失去了所有的胃口...
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0 回复 2022-01-14 08:34:48
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495921iysh
哈哈哈,我也没看到他吃了这么多~他为什么可以吃这么多,老师不管管嘛?
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0 回复 2021-11-28 14:57:57
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567368w
恶心!
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0 回复 2021-07-26 16:29:18
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567368w回复567368w
C为什么要吃那么多,害我算半天,怒了!
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0 回复 2021-07-26 16:39:53
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567368w回复567368w
我以为一共分给m个人,还用1/4*m-4算了许久,我怒了,我勃然大怒!
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0 回复 2021-07-26 16:59:07
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665794z
其实就是问C一共吃了多少三明治
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0 回复 2021-01-03 02:29:16
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Miketoll
Duti
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0 回复 2020-01-02 18:52:43
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魏姐来点辣酱
注意读题
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0 回复 2018-10-15 19:20:30
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EricaWu
前三个被所有人平分,每人吃到的fraction为:3/m
第四个被m-4个人平分,每人吃到的fraction为:1/(m-4)
Caral每个三明治都吃到了
所以他一共吃了:(3/m) + 1/(m-4)
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0 回复 2018-02-08 22:30:21
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夜晚半透明回复EricaWu
你写错了哇,前三个每个人吃到的是1/m 但是三块儿中她每块儿都吃了一份 x3 所以是3/m
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0 回复 2019-03-06 00:09:42
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hecmelo
这个题目问的是C吃的占一个三明治的多少,而不是占四个三明治的多少
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0 回复 2017-12-23 16:04:11
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哇是你哦回复hecmelo
就是最后这个地方容易忽略
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0 回复 2018-01-07 23:13:26
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