问题:The profit from the sale of a certain appliance increases, though not proportionally, with the number of units sold. Did the profit exceed $4 million on sales of 380,000 units?
(1)The profit exceeded $2 million on sales of 200,000 units.
(2)The profit exceeded $5 million on sales of 350,000 units.
1不够,2 怎么看? 谢谢
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问题:A report consisting of 2,600 words is divided into 23 paragraphs. A 2-paragraph preface is then added to the report. Is the average (arithmetic mean) number of words per paragraph for all 25 paragraphs less than 120 ?
(1) Each paragraph of the preface has more than 100 words.
(2) Each paragraph of the preface has fewer than 150 words.
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问题:PS :给树标号,范围是201到740 某一品种的树的百位一定是4、5、6、7,个位一定是2、3、4、5, 求随便抽一棵树不是这个特定品种的树的概率?
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问题:DS:is|x-y|>|x-z|?
条件1:是y的绝对值大于z的绝对值 。
条件2:是x<0。
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问题:1 3
2 B
3 4
4 10
A 2
8 1
第一列是调查的信用卡的拥有数,第二列是对应的人数,如第一行的意思就是三个人每人拥有一张信用卡,问信用卡拥有数的中位数?
(1)A=6
(2)B=7
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问题:m*(m+5)*(m+6)的因数可能是哪几个?
3 , 4 , 6
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问题:连续四天股票收盘分别停在了8230,8390,8460,8530(数字可能有出入),第五天收盘多少?
(1)这组数的差值是220
(2)8390是这组数的中位数
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问题:三角形ABC,点D在AC上,D不能与AC相交(解释说这句话的意思是BD不能等于BA和BC,是独立的),AB是否等于BC?
(1)角BDC=角BCD
(2)BD=DC
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问题:有A和B,共n个人(人数已知)他们每个人都可以同意或不同意一件事情,已知A有X人,B有Y人,bothA和B有Z人,求又是B又不同意的人?
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问题:给了两种书数量的比例3:X,求X?
(1)数的总数是15
(2)X小于13
讨论说选A,因为比例不能是3:12,必须要是最简形式1:4,可是我觉得3:12可以,3:2也可以,条件1不充分
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