Which of the following most logically completes the argument?
According to experts on shopping behavior, more shoppers would shop at Jerrod’s department store if they were offered the convenience of shopping carts.In fact, even if the amount spent by these additional customers only just covered the cost of providing the carts, providing carts would still probably increase Jerrod’s profits, since _______.
A. the layout of Jerrod’s is open enough to accommodate shopping carts comfortably
B. several department stores that compete with Jerrod’s have begun to make shopping carts available to their customers
C. there are some potential customers who would not be enticed to shop at Jerrod’s by the availability of shopping carts
D. stores that make shopping carts available to customers usually have to hire people to retrieve them from parking areas
E. a customer with a shopping cart buys more, on average, than a customer without a cart
选E，我选了c，题目中不是说了“ In fact, even if the amount spent by these additional customers only just covered the cost of providing the carts”，那即使是比 a customer without a cart买的更多，但也不能increase Jerrod’s profits阿
In the United States, of the people who moved from one state to another when they retired, the percentage who retired to Florida has decreased by three percentage pointsover the past ten years.Since many local businesses in Florida cater to retirees, this decline is likely to have a noticeably negative economic effect on these businesses.
Which of the following, if true, most seriously weakens the argument?
A. Florida attracts more people who move from one state to another when they retire than does any other state.
B. The number of people who move out of Florida to accept employment in other states has increased over the past ten years.
C. There are far more local businesses in Florida that cater to tourists than there are local businesses that cater to retirees.
D. Thetotal number of people who retired and moved to another state for their retirement has increased significantly over the past ten years.
E. The number of people who left Florida when they retired to live in another state was greater last year than it was ten years ago.
选D，也是没懂这个选项怎么削弱了。题中说the percentage who retired to Florida has decreased by three percentage pointsover the past ten years，和d选项意思不是相悖的么。 作者: YuanHuang 时间: 2012-5-9 12:15
123: 这是GMAT最经典的trick之一：百分比减少并不代表数量的减少。decreasing percentages does not automatically lead to decreasing numbers。假如说原本100个人退休，20人去佛州 （25%），现在150人退休，33人退休去佛州（22%），那么你的百分比较少了3%，但是你的人数却增加了13.
76有点牵强。。。但C明显是错的，我又想不通为什么E是对的。作者: YuanHuang 时间: 2012-5-9 12:21
GMAT里关于数字和百分比的6个常犯错误（摘自PowerScore CR Bible）： 1. Increasing percentages automatically lead to increasing numbers 2. Decreasing percentages automatically lead to decreasing numbers <- 就是第123题 3. Increasing numbers automatically lead to increasing percentages 4. Decreasing numbers automatically lead to decreasing percentages 5. Large numbers automatically mean large percentages, and small numbers automatically mean small percentages 6. Large percentages automatically mean large numbers, and small percentages automatically mean small numbers作者: reginarao403 时间: 2012-5-9 22:59
谢谢ls两位解答！！！123想通了~~ 76的疑问哪位nn来帮忙解答下吧！！！多谢作者: naoyixue 时间: 2012-5-9 23:21
我来76，==哦作者: naoyixue 时间: 2012-5-9 23:27
文章说的even if the amount spent by these additional customers，这里很清楚说addition customer带来的利润其实是0.好的，那么E说的是所有的客人，包括不是additional, 即原本的客人，那么他们在有和没有推车前后，其实对公司的利润作出了变化，（有车就买的比没车多），其实这里的利润是原来的客人带来的。原来的客人和additional 客人都适用customer will pay more, with cart, than who pay without cart