作者yasimii (蔚蓝海岸)
看板GRE_Verbal
标题Re: [数学]请教!!
时间Wed Aug 1 22:01:08 2007
我可不可以请教 第二题 字面上的意思~
这应该是文法上的问题 不知道能不能在这边问....
(不行的话 我会删掉~ 谢谢~~~~ )
2. If 55 percent of a group of people have brown hair and
80 percent of the same group do NOT have red hair, what
fraction of those who do NOT have brown hair and red hair?
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
请问 原题目是要求 "非棕发" 及 "红发" 的比例
(do NOT have brown hair) and (red hair)
还是 "非棕发" 及 "非红发" 的比例呢?
do NOT have (brown hair) and (red hair)
就解答来看 是前者 不过我一直觉得是後者....
不知道是不是在文法上我出了问题~
感谢解答~~
※ 引述《OdysseyGRE (Odyssey)》之铭言：
: 1. The "reflection" of a postive integer is obtained by
: reversing its digits. For example, 321 is the
: reflection of 123. The difference between a five-digit
: integer and its reflection must be divisible by which
: of the following?
: Ans: 9
: 2. If 55 percent of a group of people have brown hair and
: 80 percent of the same group do NOT have red hair, what
: fraction of those who do NOT have brown hair and red hair?
: Ans: 4/9
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 218.175.165.211
※ 编辑: yasimii 来自: 218.175.165.211 (08/01 22:03)
1F：推 Pluronics:4/9是(非棕发)中(红发)比例 61.216.100.161 08/01 22:04
2F：→ Pluronics:who 指的是 those =分母 61.216.100.161 08/01 22:04
3F：→ Pluronics:原题没有动词与分子的定义 61.216.100.161 08/01 22:05
4F：→ Pluronics:and应该改成have就是4/9的答案 61.216.100.161 08/01 22:06
5F：推 yasimii:and 改成 have 就懂了~!!!218.175.165.211 08/01 22:08
6F：→ yasimii:另外阿~要分子的话 是不是把and改成to呢?218.175.165.211 08/01 22:12
7F：推 Pluronics:改成have就有分子了(red hair) 61.216.100.161 08/01 23:40