请张慧雯老师回答一下这篇阅读的两题。
第一题,我定位到第二段(因为整个就是the first explanation”)。但是后面看到选项BCD好像还要定位到第四段“in 1840, about… was rough the same”这两个地方。但是我不知道精准定位是在哪里。然后还是不太懂这篇文章的意思,以及这一题为什么选C。
第二题,看到题干就觉得好难定位,通篇好像都要读,没办法快速根据题干来定位,结果还错选了A。请老师解答一下这一题的突破点以及为啥选D。
What is the median number of employees assigned per project for the projects 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 projects at Companny Z have 2 or fewer employees assigned to each project.
GMAT数学(博智教材)第62页:If X is equal to the sum of the even integers from 40 to 60, inclusive, and y is the number of even integers from 40 to 60, inclusive, what is the value of x+y?
X=40+42+44......60=550
Y=(60-40)/2+1=11, 答案应该是561,为什么书后面的答案显示是560?
DS:5个数中 median 小于 average ;另外7个数也median 小于 average,然后这12个数没有重复的,12个数放在一个数集里面,问是不是median 小于average?
条件1:7个的average 小于 5个的average
条件2:7个的median 小于 5个的 median