扫描二维码，直接登录
题库 / Prep2007E2-DS-63
If m is a positive odd integer, what is the average (arithmetic mean) of a certain set of m integers?
(1) The integers in the set are consecutive multiples of 3.
(2) The median of the set of integers is 33.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
是等差数列不是等比数列
一个数集里有m个数，没说是consecutive integers
这set里是m 个 intergers 有奇数个ntergers
不管m是多少，只要是奇数个，平均数是33.