※ 引述《iiia (ii)》之銘言： : 1.If the ratio of men to women employed by Company S in 1975 was 1/2, : What is the ratio of men to women employed by Company S in 1976? : (1) Company S employed 20 more women in 1976 than in 1975. : (2)Company S employed 20 more men in 1976 than in 1975. : 我知道這兩格條件單獨分開是都不行的.. : 但結合在一起不是可以設X Y 求出XY 然後知道1976年的比率 : 但答案是~~E 不懂你的意思...原本的樣本數沒給妳 只知道增加多少人(多少男 多少女...) 如何知道比率@@"?? 1975 40 : 80 => 1976 60 : 100 => 3:5 1975 90 : 180 => 1976 110 : 200 => 55 : 100 也沒條件讓你列式呢.... : 2.Exactly how many bonds dose Bob have? : (1)Of Bob's bonds , exactly 21 are worth at least $5.000 each : (2)Of Bob's bonds , exactly 65 percent are worth less than $5.000 each. : 第一條件我看不太懂說.... : 答案C 問有多少bonds? 五元以上有21張 未滿五元的有65% 可以知道五元以上有35% 35%=21張 就可以知道全部有幾張了.... 所以C... 其他看上一篇吧 ※ 編輯: giyoshi 來自: 123.192.191.99 (02/13 01:54)