[問題] 這二題計量有陷井嗎?

看板GRE (GRE入學考試)作者時間17年前 (2008/07/23 02:05), 編輯推噓4(401)
留言5則, 5人參與, 最新討論串1/1
90. Given that, there are 500 people in a town and 50% own computers and 26% own computers with internet access. Whatt is the percentage of people who have computers and don’t have access to internet? => 是24%嗎? 真的這麼簡單?? 91. Col A: Volume of a cube of surface area 150*y^2 Col B: 125*y^3. => 大家覺得是一樣大還是不一定呢?? 設cube邊長為a 6*a^2 = 150*y^2 =>a^2 = 25y^2 => a=5y or a=-5y Col A: Volume = 125*y^3 or -125*y^3 So answer = D 如果是D考題似乎有點奸詐 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.168.89.73

07/23 08:26, , 1F
不用考慮負的情況吧 邊長沒有負的
07/23 08:26, 1F

07/23 12:37, , 2F
邊長是a是正的 是y有可能是負的情形
07/23 12:37, 2F

07/23 19:19, , 3F
90. 50%*74%=37%
07/23 19:19, 3F

07/23 19:32, , 4F
#90是48%嗎??
07/23 19:32, 4F

07/25 17:36, , 5F
應該是37% 50% * (100%-26%) = 37%
07/25 17:36, 5F
文章代碼(AID): #18XY5lb3 (GRE)
文章代碼(AID): #18XY5lb3 (GRE)