※ 引述《KMI (无奈)》之铭言： : DS: 刚刚模考做到 : A certain one-day seminar consisted of a morning session and an afternoon : session. If each of the 128 people attending the seminar attended at least : one of the two sessions, : how many of the people attended the morning session only? ^^^^ : 1) 3/4 of the people attended both sessions. : 2) 7/8 of the people attended the afternoon session. : 答案: B 解法：128= M(only morning) + A(only afternoon) - MA(both morning + afternoon) 求 M? (1)3/4 * 128 = MA (2)7/8 * 128 = A + MA → 1/8 *128 = M 所以(2)即可得答案，充份!! 选B <我觉得画圆饼图看就会很清楚喔> : A certain city with a population of 132,000 is to be divided into 11 voting : district, and no district is to have a population that is more than 10% : greater than the population of any other district. What is the minimum : possible population that the least populated district could have? : 1. 10700 : 2. 10800 : 3. 10900 : 4. 11000 : 5. 11100 : 答案: D 解法：设最小的district为x 其余为y(假设其他一样多人) x + 10y =132,000 ------1式 y ≧ 1.1x ------2式 把2式代入1式中 得11000≧x 求出答案 D --

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