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【OG20-P286-375题】
Was the number of books sold at Bookstore X last week greater than the number of books sold at Bookstore Y last week?
(1) Last week, more than 1,000 books were sold at Bookstore X on Saturday and fewer than 1,000 books were sold at Bookstore Y on Saturday.
(2) Last week, less than 20 percent of the books sold at Bookstore X were sold on Saturday and more than 2 0 percent of the books sold at Bookstore Y were sold on Saturday.
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分析A选项
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分析B选项
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分析C选项
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分析D选项
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分析E选项
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条件1：上周六X书店销量>1000，上周六Y书店销量<1000，但是一周总量无法比较，不充分
条件2：上周六X书店销量<20%X，上周六Y书店销量>20%Y，同理一周总量无法比较，不充分
结合：X书店上周销量>1000/20%，Y书店上周销量<1000/20%，X>Y，充分
题目讨论 （8条评论）
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499685skw
只要能了解到X与Y之间的比较即可
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2022-09-07 14:27:52
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冲他丫的
条件2说了 周六卖的占总体比 可以计算得出 x〉y
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2021-10-17 15:19:07
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1337272efzn
看漏了percentage是占比一周总数，而不是单独周六一天的。 X店卖1000以上，是总数的20%都不到 而Y店，卖了不到1000本都已经占了总数的20%以上了。 那这样看X的基数肯定比Y的基数要大
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2021-02-19 00:37:55
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187055mhbig
两个条件都说的是on Saturday在周六啊，只有周六这一天的值知道，可题干不是要求the week一整周吗？两个加起来也只能求周六那天的啊！求解答
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2019-10-01 16:08:50
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541613q回复 187055mhbig
use the percentage divide by the 1000, you will get the who week! read the second condition carefully with a question what is the 20 percent！
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2019-10-23 10:37:39
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1521764tlyg回复187055mhbig
条件二说的是X周六卖的量少于上周整个星期的总量的20%，Y周六卖的量大于整个星期的20%。结合条件一，X卖了一千多本还不到总量的20%，Y卖了不到一千本就超过总量20%了，显然X比Y卖的书多
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2021-10-01 23:30:51
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lxra
Using the information from statements one and two, we can define the following variables: x = the number of books sold at Bookstore X last week y = the number of books sold at Bookstore Y last week s = the number of books sold at Bookstore X on Saturday (note: s > 1,000) t = the number of books sold at Bookstore Y on Saturday (note: t < 1,000) SO S>1000>T p = percent of books at Bookstore X sold last week that were sold on Saturday (note: p < .2) q = percent of books at Bookstore Y sold last week that were sold on Saturday (note: q > .2) SO q>0.2>p Using our variables, we can create the following equations: x = s/p and y = t/q We need to determine whether x > y, or s/p > t/q, or sq > pt. Since s > t and q > p, and all values are positive, we can determine that sq is greater than pt, and thus that x > y. 来自ttp
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2018-11-18 15:16:33
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Was the number of books sold at Bookstore X last week greater than the number of books sold at Bookstore Y last week? (1) Last week, more than 1,000 books were sold at Bookstore X on Saturday and fewer than 1,000 books were sold at Bookstore Y on Saturday (2) Last week, less than 20 percent of the books sold at Bookstore X were sold on Saturday and more than 20 percent of the books sold at Bookstore Y were sold on Saturday Sir: The question is asking about the entire week, highlighted in BLUE. But we have been given information for Saturday. How can we conclude about the entire week based on the information provided for Saturday (Only ONE day) ? Please share your thoughts. Thanks again! See, Statement 2 is actually talking about the books sold over the entire week. Try Reading it clearly. It says, Books sold on Saturday represents some some percentage of the entire week books.
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2017-11-20 05:09:16
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11
A ] Does not tell us anything about the sales in the rest of the week .INSUFFICIENT B] Does not tell us 20% of what , hence we cannot compare . INSUFFICIENT Together Let sales at bookstore X on saturday be 1001 . Therefore >5005 books were sold in the week Let sales at bookstore Y on saturday be 999. Therefore <4995 books were sold during the week Hence we can conclude that sales at X were greater than Y for the given week
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2017-11-20 04:59:34
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Ada
条件1得 X书店上周六卖了多余1000本书 基数大； Y书店上周六卖了少余1000本书 基数小 条件2的20% X书店占比小 Y书店占比大 由此得出结论： 书店销量1000/0.2分母越大分子越小，销量越大 整周X店的销量>Y店的销量
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2017-08-12 21:29:22
