MATH IQ TEST
2008-03-15 7:24 am
Total 100 people, 10 people do not know Chinese and English, 75 people know English, 83 people know Chinese, how many people know both English and Chinese
回答 (5)
2008-03-15 7:41 am
✔ 最佳答案
Let the number of people know both English and Chinese be XLet the number of people know English only be Y
Let the number of people know Chiese only be Z
X+Y+Z=90
X+Y=75
X+Z=83
therefore, X=68
2008-03-20 3:46 am
Total 100 people, 10 people do not know Chinese and English, 75 people know English, 83 people know Chinese, how many people know both English and Chinese
ANS: 68 people
ANS: 68 people
2008-03-15 7:38 am
10 people do not know Chinese and English
100 - 10 - 75 = 15 people know Chinese but do not know English
100 - 10 - 83 = 7 people know English but do not know Chinese
100 - 10 - 15 - 7 = 68 people know both English and Chinese
100 - 10 - 75 = 15 people know Chinese but do not know English
100 - 10 - 83 = 7 people know English but do not know Chinese
100 - 10 - 15 - 7 = 68 people know both English and Chinese
2008-03-15 7:36 am
75people know both English and Chinese
2008-03-15 7:28 am
10 people do not know Chinese and English
---> 90 people know both English and Chinese
---> 90 people know both English and Chinese
收錄日期: 2021-04-13 15:35:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080314000051KK03306