请教一下分三明治

zxlstc1221 · 发表于 2010-4-16 12:03:39

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?

A: (m+4)/[m(m-4)]
B: (2m-4)/[m(m-4)]
C: (4m-4)/[m(m-4)]
D: (4m-8)/[m(m-4)]
E: (4m-12)/[m(m-4)]

zxlstc1221 · 发表于 2010-4-16 12:27:44

没人帮忙吗??在线等解答阿

ellie8916 · 发表于 2010-4-16 12:30:30

3/m+1/(m-4) 化简一下啊

zxlstc1221 · 发表于 2010-4-16 12:33:14

能稍微解释一下吗!????

ellie8916 · 发表于 2010-4-16 12:46:40

就是前面3块m个人分，他拿到了3/m，后面1块只有m-4个人分，他拿到了1/m-4，加起来就好了。

请教一下分三明治

所属分类: GMAT考试

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