[計量] 兩題計量請教

看板GRE (GRE入學考試)作者 (麥特..嘓)時間13年前 (2011/04/08 00:36), 編輯推噓5(507)
留言12則, 4人參與, 最新討論串5/9 (看更多)
Q1. ┌───┬───┐ │ Teams│Scores│ ├───┼───┤ In a contest, 5 judges evaluate 8 teams with the │ A │ 14 │ scores from 0 to 10, and the table above list ├───┼───┤ (就是左邊那個圖表) the scores of 8 different │ B │ 17 │ groups. Based on the scores, how many of the teams ├───┼───┤ must have at least 7 scores from one judge? │ C │ 25 │ ├───┼───┤ (A)4 (B)5 (C)6 (D)7 (E)8 │ D │ 29 │ ├───┼───┤ Ans.(A) │ E │ 31 │ ├───┼───┤ │ F │ 35 │ ├───┼───┤ │ G │ 44 │ ├───┼───┤ │ H │ 49 │ └───┴───┘ Q2. In a certain class a professor awards his students grades A, B, C, D, and F. If at least one of the grades has 6 or more students, what is the least total number of students in the class? (A)30 (B)27 (C)26 (D)25 (E)22 Ans.(C) 這題我的想法是,只要有一個grade有6個學生那其他grade低於6, 這樣(E)不是更好? 想了很久還是想不通,希望有人能夠幫忙解答,謝謝^^ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 125.225.15.152

04/08 00:40, , 1F
1.只要大於30就一定有人給七分
04/08 00:40, 1F

04/08 00:41, , 2F
第二題很像就25+1
04/08 00:41, 2F

04/08 00:43, , 3F
我有疑問的是,這有沒有可能出現極端的情形?
04/08 00:43, 3F

04/08 00:44, , 4F
譬如說某幾個judge給很低 然後另外幾個給特別高?
04/08 00:44, 4F

04/08 00:44, , 5F
第一題你這樣想 一個裁判給七 其他都給六 總分為31
04/08 00:44, 5F

04/08 00:48, , 6F
沒錯沒錯就是去算很極端的情形~
04/08 00:48, 6F

04/08 00:48, , 7F
會有極端情形 但"at least"就是指必然會發生
04/08 00:48, 7F

04/08 00:50, , 8F
請問一下第二題怎麼解阿 我怎麼看不太懂題目
04/08 00:50, 8F

04/08 00:56, , 9F
至少有一個等第有六以上
04/08 00:56, 9F

04/09 10:42, , 10F
為什麼第一提不能有A: 7 2 2 2 1= 14這種分數?
04/09 10:42, 10F

04/09 10:42, , 11F
第二題為什麼不能有 6 1 1 1 1 這種班級數
04/09 10:42, 11F

04/09 10:43, , 12F
一定要平均嗎 ? T_T
04/09 10:43, 12F
文章代碼(AID): #1DdUWR-d (GRE)
文章代碼(AID): #1DdUWR-d (GRE)