magoosh一道题
In set S, there are four numbers. Three of the numbers are 13, 29, and 41, and the fourth number is X. If the mean of the set is less than 25, what could be the value of X?
Indicate all possible values of X.
答案里有13,可是这个集合本身已经有13了,所以GRE的集合概念和我们高中学的集合的互斥性不一样??作者: 岳然 时间: 2015-10-5 12:12:30
OG表示repetitions are not counted
你可以跟magoosh提一下这个问题作者: gterlann 时间: 2015-10-5 18:19:44