请教两题,谢

bloomingtrees

In the decimal representation of X , where 0<x<1, is the tenths digit of x nonzero?

1)      16x is an integer

2)      8x is a integer

 

 

Yesterday each of the 35 members of a certain task force spent some time working on project P. the graph shows the number of hours and the numbers who spent that number of hours working on project P yesterday(9members working 1 hours;4members for 2hours; 1 members for 3hours; 2members for 4hours; 1members for 5hours; 8 members for 6hours; 10 members for 7 hours ). What was the median number of hours that the members of the task force spent working on project P yesterday ?

2

3

4

5

6

7

mingzhu11

第一题应该是问小数点10位上的情况吧。

我觉得是B.因为1/16是0.0625

第二题就是就加重平均数。

151（9*1+4*2+1*3+2*4+1*5+8*6+10*7)/35

britney-gao

第2题其实不用那么复杂用公式去做,直接数下就得:

总共有35个人,求中数,所以就看第18个就行了,然后再看图就是6hours了,记得是GWD上的题.

个人观点,仅供参考

uspresident

我也觉得是求中数,不是平均数,所以直接算了