GWD 几道数学题，谢谢大侠们！

jiubuxihuan

1 投硬币，a certain coin has equal probobility of landing on either side, if the coin is tossed 3 times, what is hte probobility that is will land on the same side each time?

a 1/8   b 1/4 c 1/3 d 3/8 e 1/2            答案是b 我怎么觉得是a呢？

2 Is the decimal represataion of X where 0<x<1 is the tenths digit of x nonzero?

1)16x is an integer

2)8x is an integer

3 What is the madian number of employees assigned per project for the porjects at company z?

1)25 percent of the projects at company z have 4 or more employees assigned to each project

2) 35 percent of the project at company z have 2 or fewer employees assigned to each projects

many thanks for Daxia!

jiubuxihuan

第三题还是不懂：为什么median只能在40%呢？如果40%的porjects have 6 or more people 那么就会有不同的结果了阿，所以结果不唯一阿？