苦寻不到答案阿~~贵人~进来坐啊!!

25-Q10

     The sides of a square region, measured to the

         nearest centimeter, are 6 centimeters long. The

         least possible value of the actual area of the

         square region is

A.36.00 sq cm

B.35.00 sq cm

C.33.75 sq cm

D.30.25 sq cm

E.25.00 sq cm

Answer

这题答案到底是什么哩?? 说法很多耶??

27-Q14:

The number of defects in the first five cars to come through a new production line are 9, 7, 10, 4, and 6, respectively.  If the sixth car through the production line has either 3, 7, or 12 defects, for which of theses values does the mean number of defects per car for the first six cars equal the median?

I.                    3

II.                 7

III.               12

A.  I only

B.  II only

C.  III only

D.  I and III only

E.  I, II, and III

Ans: D

为啥不是C呢?? 只有12合啊??

27-Q33:

The table above shows the results of a survey of 100 voters each responded “favorable” or “unfavorable” or “not sure” when asked about their impressions of candidate M and of candidate N.  What was the number of voters who responded “favorable” for both candidates?

(1)   The number of voters who did not respond “favorable” for either candidate was 40.

(2)       The number of voters who responded “unfavorable” for both candidates was 10.

ANS: A

是因为太简单了吗?? 请帮忙

苦寻不到答案阿~~贵人~~进来坐啊!!

I am just a layman....

27-Q14:

when:SIXTH CAR=3 DEFECTS

average defects=6.5

median of (3,9, 7, 10, 4, 6)  =6+7/2

27-Q33

try to draw a vain:

voters had to choose favorate M or N alone, or both, or disfavorate none of them( did not respond “favorable")

You can find out the number of M's funs (40)+the numble of N's funs(30)-The number of voters who respond “favorable” for both candidate ( x)=100-.The number of voters who did not respond “favorable” for eighter candidate ( 40)

SO,x=10....

The number of voters who responded “unfavorable” for both candidates was 10 reveals nothing......

第一题考四舍五入5.5*5.5=30.25，小于那个都错。选E

考四舍五入，那应该选D呀，再小就不够5.5了

第二道好好算就行了

第三道是这样的：喜欢M的是A，喜欢N的是B

A＝40　B＝30，　1）A并B的补＝40，A交B＝10　选A

2）推不出

不懂第三题的条件二

他的意思是说
            在两组里面
            说不喜欢的人
            是10个人吗??

可是图表给的明明就是一个35人一个20人说不喜欢啊??
            

还有这里的both 和either表达的意思都一样吗??

还有第一题
            还是没有统一的解吗??

第一题选D，题目说最小的，就是5.5的平方