Re: [問題] OG12-CR-78

看板GMAT (GMAT入學考試)作者Depp (記得去看moby)時間16年前 (2010/04/10 22:47)推噓1(1推 0噓 10→)

留言11則, 2人參與討論串2/2 (看更多)

※ 引述《halaphone (Still Ballin)》之銘言： : A recent report determined that although only 3percent of drivers on Maryland : highways equipped their vehicles with radar detectors, 33 percent of all : vehicles ticketed for exceeding the speed limit were equipped with them. : Clearly, drivers who equip their vehicles with radar detectors are more likely : to exced the speed limit regularly thatn are drivers who do not. 3%equip radar,33%ticket equip radar Equip radar==>more likely to exceed speed limit regulary : The conclusion drawn above depends on which of the following assumptions? : a. Drivers who equip their vehicles with radar detectors are less likely to be : ticketed for exceeding the speed limit than are drivers who do not : b. drivers who are ticketed for exceeding the speed limit are more likely to : exceed the speed limit regularly than are drivers who are not ticketed. 超速的人容易一直超速取非,超速的人不會比一般沒超速的人更容易超速假設1000個開車的人超速100人次 30個裝Radar, 那照理來講頂多超速的佔3% 30個人不過超速33%的人裝Radar,有330人次,因此代表30個裝雷達的人重複的超速填補缺口結論 more likely to exceed speed limit regulary : c. The number of vehicles that were ticketed for exceeding the speed the limit : was greater than the number of vehicles that were equipped with radar : detectors. : d. Many of the vehicles that were ticketed for exceeding the speed limit were : ticketed more than once in the time period covered by the report more than once 次數不是重點取非只有一次對結論沒有影響 : e. Drivers on Maryland highways exceeded the speed limit more often than did : drivers on other state highways not covered in the report. : Ans: B : 這題我想了很久，還是不明白為什麼要選B : 我的思路是以下 : 題目的結論是有裝detector的人比較容易regularly的超速 : 問作者是基於那個assumption這麼說 : a.說的是有裝detector的人比沒裝的人較不容易接到罰單 : -這個跟作者的結論相反所以不選 : b.接到罰單的人通常都是愛超速的人 : -跟題目有一些關聯，我保留 : c.跟題目說的也沒有什麼關係而且他把不同類的事件拿來比較，我也第一步就刪掉 : d.感覺跟題目有關聯，我也保留 : e.扯到別的state去了，直接刪 : 最後剩下B, D決選 : 我選了D : 請問我應該要怎麼解這種問assumption的問題?? : 我看完答案後猜會選B的原因是因為B說會接到罰單的人通常都是常超速的人 : 因為他們常超速，所以才會裝detector所以結論是裝detector的人都是愛超速的人 : 但這是我在看完答案後才知道要這樣去解釋，如果不看答案我就會選錯 : 不知道有沒有戰友可以提供更好的思路? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.44.178.71