Re: [計量] 請教 PP2 test1 一題圖表題
※ 引述《addison1001 (小歐)》之銘言：
: PP2 test one 有一題計量的圖表題
: 借一下"whereright (需要放空...)"網友的圖
: http://photo.xuite.net/happyeverydaay/5218184/1.jpg
: 第三題中問到
: If each of the average rating was the arimetic mean of rating given by
: the 100 travel agents, approximately how much greater was total of the ratings
: given to all three airlines for reliability than that for promptness?
: A)25 B)50 C)125 D)250 E)500
: 可以請問一下這題在問什麼嗎?
: 要怎麼算?
: 非常感謝
借這邊問一下
原文放的這個圖 我也不會 有神人能幫我解釋嗎?
http://photo.xuite.net/happyeverydaay/5218184/1.jpg
敘述題..
http://ppt.cc/LmL2
A developer has land that has X feet of lake frontage. The land is to be
subdivided into lots, each of which is to have either feet or 100 feet of
lake frontage. if 1/9 of the lots are to have 80 feet of frontage each and
remaining 40 lots are to have 100 feet of frontage each, what is the value of
x?
A 400 B 3200 C 3700 D 4400 E 4760
最後是這題比大小
http://ppt.cc/9bsV
有神人能幫我解答嗎? 謝謝
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