作者SHAOCHU (月台上的观察员)
看板GMAT
标题[Q. ] GWD难题解析
时间Tue Dec 23 00:15:47 2014
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?
[解]前三块分给m位学生，第四块分给(m-4)位学生，Carol四块都有被分到。
故比例为：(3/m)+[1/(m-4)]= [3(m-4)+m]/[m(m-4)]=(4m-12)/[m(m-4)]。
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