Re: [數學]請教!!
我可不可以請教 第二題 字面上的意思~
這應該是文法上的問題 不知道能不能在這邊問....
(不行的話 我會刪掉~ 謝謝~~~~ )
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?
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
請問 原題目是要求 "非棕髮" 及 "紅髮" 的比例
(do NOT have brown hair) and (red hair)
還是 "非棕髮" 及 "非紅髮" 的比例呢?
do NOT have (brown hair) and (red hair)
就解答來看 是前者 不過我一直覺得是後者....
不知道是不是在文法上我出了問題~
感謝解答~~
※ 引述《OdysseyGRE (Odyssey)》之銘言：
: 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
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 218.175.165.211
※ 編輯: yasimii 來自: 218.175.165.211 (08/01 22:03)
推
08/01 22:04, , 1F
08/01 22:04, 1F
→
08/01 22:04, , 2F
08/01 22:04, 2F
→
08/01 22:05, , 3F
08/01 22:05, 3F
→
08/01 22:06, , 4F
08/01 22:06, 4F
推
08/01 22:08, , 5F
08/01 22:08, 5F
→
08/01 22:12, , 6F
08/01 22:12, 6F
推
08/01 23:40, , 7F
08/01 23:40, 7F
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