How do we define "foot traffic"

sexybaby

Advertisement: Ten years ago, the Cormond Hotel's lobby was carpeted with Duratexcarpet while the lobby of a nearby hotel was being carpeted with ourcompetitor's most durable carpet.  Today,after a decade in which the two hotels have had similar amounts of foot trafficthrough their lobbies, that other hotel is having to replace the worn-outcarpeting near its lobby entrances, whereas the Cormond's Duratex carpeting hasyears of wear left in it.

Which of the following, if true, most seriouslyweakens the force of the advertisement's evidence for concluding that Duratexcarpet is more durable than the carpet of its competitor?

A. The lobby of the Cormond Hotel has fivedifferent entrances, but the lobby of the other hotel has only two.

B. The carpet of the Cormond Hotel's lobby is notthe most durable carpet that Duratex manufactures.

C. The other hotel has a popular restaurant thatcan be reached from outside without walking through the hotel lobby.

D. The carpet that is being used to replacecarpeting near the other hotel's lobby entrances is not Duratex carpet.

E. There is a third hotel near the other two thathas not replaced the Duratex carpet in its lobby for more than 15 years.

sammilulu

foot traffic就是人流，不要想得那么复杂；C hotel和other hotels 的FT一样，推出地毯应当损耗相同；现在的结论是other hotels地毯要换（损耗严重），那么就是要找一个不一样的地方，就是A啊。
如果非要用常识来解释，两块地毯，100个人走，A是100个人分5个点踩踏，B是100个人分2个点踩踏，单位面积上当然是B的磨损会更厉害。

不过GMAC只给你2分钟做一题逻辑，不会要求你这么复杂的思路的，要绕死自己的呵呵。

sexybaby

如果是上面的解释正确, foot traffic amount在每个lobby的分布就不similar了啊,

sexybaby

还是问题出在这里面相似的是"Foot traffic in the lobby"-假设是F,对于各个门附近的Foot traffic,对于A来说就是F/5,B来说就是F/2.

sexybaby

由常识判断,在外部环境(空气湿度,温度)一致的情况下,地毯的损坏曲线应该与单位面积所经踩踏数(foot traffic)正相关.和这些脚步从哪些门进来的没有关系啊.

sexybaby

答案是A, 指出了两个饭店的不相似点.门的多少不一样.

但是问题是,既然2个饭店有相近的foot traffic,那就意味着两家酒店的相同面积的地毯所经踩踏的脚步数是相似的.(也就是从某种程度上说脚步密度相似)既然密度相似,和有几个门关系并不大啊?

如果指出不一样就是答案,那是不是A饭店比B饭店多一个厨师,A饭店服务比B饭店好,A饭店比B饭店多一个门童也是答案呢?