[計量] GR91-17 圖表題 Physicians classified …

看板GRE (GRE入學考試)作者 (Nbear)時間16年前 (2009/08/04 23:16), 編輯推噓4(406)
留言10則, 4人參與, 最新討論串1/1
在OG p.230頁 標題為physicians classified by category in 1977 圓餅圖 Percent of Physicians by Category General Practice 13.1 Medical 25.1 Surgical 24.0 Anesthesiology 3.3 Psychiatry 5.9 Pathology 2.9 Radiology 2.9 Other Specialties 22.8 (100% = 421,300) 直方圖 Number of Physicians Within Medical and Surgical Categories (in thousands) Medical Internal Medicine 61.8 Pediatrics 24.0 Other Medical Specialties 19.9 Surgical General Surgery 32.3 Obstertrics/Gynecology 23.4 Ophthalmology 11.6 Orthopedics 12.3 Other Surgical Specialties 21.5 請教高手們下面這一題,謝謝 25 In 1977, if twice as many anesthesiologists as orthopedists were sued for malpractice and 10 percent of the orthopedists were sued, approxmately what percent of the anesthesiologists were sued? A. 5% B. 9% v C.18% D.22% E.25% -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.118.128.111

08/04 23:27, , 1F
17.7%?
08/04 23:27, 1F

08/04 23:44, , 2F
答案是c 18%,樓上算對了。請教算法
08/04 23:44, 2F
※ 編輯: plrbr 來自: 122.118.128.111 (08/04 23:46)

08/05 00:02, , 3F
連題目都看不懂,有請一樓解答
08/05 00:02, 3F

08/05 01:17, , 4F
twice as many anesthesiologists as orthopedists
08/05 01:17, 4F

08/05 01:17, , 5F
代表 2*O=A 我簡寫取字首
08/05 01:17, 5F

08/05 01:18, , 6F
而A總人數為 421300*3.3%=13903
08/05 01:18, 6F

08/05 01:19, , 7F
題目說有10% O被告,但是A被告的人數是有O的兩倍
08/05 01:19, 7F

08/05 01:20, , 8F
A被告人數=12.3*1000*10%*2=2460
08/05 01:20, 8F

08/05 01:22, , 9F
A被告人數佔A總人數比例=2460/13903=17.69%≒18%
08/05 01:22, 9F

08/05 19:15, , 10F
感謝,我就那句看不懂
08/05 19:15, 10F
文章代碼(AID): #1AU53RP5 (GRE)
文章代碼(AID): #1AU53RP5 (GRE)