The percentage of households with an annual income of more than $40,000 is higher in Merton county than in any other county. However, the percentage of households with an annual income of $60,000 or more is highest in Sommer county.
If the statements above are true, which of the following can properly be concluded on the basis of them?
No household in Merton county has an annual income of $60,000 or more.
Some households in Merton county have an annual income between $40,000 and $60,000.
The number of households with an annual income of more than $40,000 is greater in Merton than in Sommer county.
Average annual household income is higher in Sommer than in Merton county.
The percentage of households with an annual income of $80,000 is higher in Sommer than in Merton county.
首先%对比不涉及具体数字。
然后4w以上M%高,6w以上S%高。对B取非就简单了,如果M没有4w-6w之间的家庭,那么对M来说4w以上的%就是6w以上的%,然后要高过S在6w以上的%。不成立
第二遍做,觉得B中的some没有很说到点子上,就没直接选,排除了其他错的,B最优
这道题可以进行预判,结论应该讲的是和40,000-60,000的人数怎么怎么样
【错因,时间紧,慌乱】
percentage与number,average的区别
Suppose no households in Merton country have annual income between 40K and 60K. The percentage of households with an annual income of more than $40,000 is higher in Merton county than in any other county. This means that Merton has the highest percentage of over 60K. This is not true since the percentage of households with an annual income of $60,000 or more is highest in Sommer county.
https://forum.chasedream.com/thread-1250584-1-1.html
D选项有些想当然了,比例高不一定代表平均数高,有可能区域贫富差距很大,所以平均水平还是M更高。
集合知识
收入8以上的人只是收入6以上的人的集合中的一个子集,你不能说包含了这个子集的集合比另一个更大,这个子集就比另一个集合的子集更大吧?
子集的大小由子集的具体数值得来,在这里表现为百分比,要知道这个百分比的大小你至少需要知道收入8以上的人的具体数值和总量,而这两个信息都是未知的,所以收入8以上的人所占百分比未知,大小也未知。
该题只有B和题干信息之间有或然性关系,其他的全部无关。
根据原文得出:在M中,40K-60K的居民百分比大于S国
因此B选项是正确的(取非正确)
对比百分比的题目中,若选项出现数字比较,则是错误的;E选项是不确定的
老师 您好,这里“$60,000 or more is highest in Sommer county”不是提到了$60,000以上么?那么$80,000为什么不对呢?
【笔记】And the percentage between 40,000 and 60,000 is higher in Merton than in Sommer county.
眼瞎看C是number忘了题目是percentage
原文说的是收入大于40000的M城的人数比例是最多的(也就是说应该M城有最多比例的人收入都大于40000而不是等于40000),而收入大于或等于60000的S城的人数比例也最多的。那为什么M城不是收入大于60000的人数比例最高的城市呢?只有可能是M城有很大一部分的人收入大于40000而又小于60000,所以M城才没有成为收入大于60000的人数比例最高的城市。就是一个数学题啊~~~
M大于4万美元收入的家庭比例最大,S大于6万美元收入的家庭比例最大,但推不出S大于8万美元的比例最大,所以E错。
the percentage the number 我果然眼瞎
真的是除了B选项,其他都不一定会发生
C: The number of households, wrong. if percentage, yes.
粗心了,没看到C说的是number
???
咋...
刚没想通……
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