[原创]1月5日上午上海杀鸡（一战：Q47，V40，710）工作汇报——总体尚好，略有瑕

lyj851011

顶一个,看过楼主的另一个帖子，哈哈。

xxbc1

以下是引用chengdong在2007-1-5 17:09:00的发言：

BF题老是做不好。请教一下C、D选项有什么区别，我怎么觉得C对啊，谢谢

C  The first is an explanation that the argument challenges; the second provides evidence in support of a competing explanation that the argument defends.
  

D  The first is an explanation that the argument challenges; the second is evidence that has been used against an alternative explanation that the argument defends.

这题选C，天山9－25，答案确认

xxbc1

数学里有一题很难，讲的是一个书架上有4本红书，6本绿书，如果从书架上拿5本书，其中至少有一本红书和一本绿书的概率。我直接猜了个答案。

此题答案为1－C(6,5)/C(10,5)=5/6

这题同以下一题很像：

Q30:

There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.  How many possible selections of 4 books from this self include at least one paperback?

A.      40

B.      45

C.      50

D.     55

E.      60

答案C，我怎么做都觉得是D，惭愧。

此题答案C，＝C(8,4)-C(6,4)=55

饭饭七

以下是引用chengdong在2007-1-5 16:57:00的发言：

Q30:

There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.  How many possible selections of 4 books from this self include at least one paperback?

A.      40

B.      45

C.      50

D.     55

E.      60

答案C，我怎么做都觉得是D，惭愧。

这道我算也是55吗。C(8,4)-C(6,4)=55啊，不知道哪儿算错了

应该是答案错了吧。我算的也是D

graceyin7

GWD理有一題一模一樣，答案也是D。

anstsdu

LZ是不是一出来就打电话的那个呀？我进去的时候一个GG正好出来打电话说自己考了710~

ptr07

thanks

fantasy06

LZ的心态真好！

yn107

此题答案为1－C(6,5)/C(10,5)=5/6

why my calculation is 1－C(6,5)/C(10,5)=41/42?

ptr07

Would you please tell me which MIT program you are applying for? SDM? If so, we might be classmate(hopefully, depends on my test and application). Hope you get in the MIT door this year.