4. There are rooms from 101 to 550 inclusive in which the starting rooms are numbered from 1, 2, 3 and the waiting rooms are numbered from 4,5,6. What is the probability that the rooms 4, 5, 6 will be choosed randomly?


10. Given 'k' is an odd integer greater than 100 and if it is a multiple of 'd' other than k itself.
Col A: d
Col B: k/2
这道是不是k/2>d? 这道题是不是说d是k除了它本身以外的唯一因子了？如果是的话，K应该是某个质数的2次方？

10. These are scores of a student in two tests for which 1000 students appeared in each test. Mean Score student's score percentile
Test 1: -- 250 400 90th
Test 2: -- 200 360 xth
这道是不是无法计算？


16. The area of town A which lies in city B is 20% of the area of city B not in town A
Col A: Ratio of area of A to that of B
Col B: 18%
请问这道题是不是town A的面积全部在CITY B里面的还是只是部分？按常理似乎应该全部，如果只是部分就无法计算了？

多谢了

10. Given 'k' is an odd integer greater than 100 and if it is a multiple of 'd' other than k itself.
Col A: d
Col B: k/2
K=d^2, different facors are 1,k and d,
so B

16. The area of town A which lies in city B is 20% of the area of city B not in town A
Col A: Ratio of area of A to that of B
Col B: 18%
请问这道题是不是town A的面积全部在CITY B里面的还是只是部分？按常理似乎应该全部，如果只是部分就无法计算了？

D? uncomparable?

4. 这题的意思其实是说有编号为101到550的房间，starting room的编号以1,2,3开始（也就是说所有1xx, 2xx, 3xx的房间都是starting room），所有4xx, 5xx, 6xx的房间都是waiting room。
所有start room一共有101到399共299个，waiting room一共有400到550共151个。概率大概是1/2

10. Given 'k' is an odd integer greater than 100 and if it is a multiple of 'd' other than k itself.
这个我倒看不出2次方等结论。不过题目说了k是d的倍数，k又是奇数，d肯定不是k/2，所以只能是k/m (m>2)的某个数。所以d < k/2

10. These are scores of a student in two tests for which 1000 students appeared in each test. Mean Score student's score percentile
我觉得是没法儿算

16. 哥们儿你这个“按常理”看得我虎躯一震啊...
The area of town A which lies in city B 这句按我的理解应该是A整个在B里面了
所以A/B = 20% / (1+20/%) = 1/6 < 18%

谢谢

第4道如果1，2，3的starting room有299，4，5，6的有151，
抽中4，5，6的概率不是151/(151+299)吗？为什么是1/2?

啊啊...是我昏头了...应该是151/450...这题应该是选最接近的答案，我琢磨选项里肯定有1/3哈哈～

谢谢了：）