最新提问
我的动态
登录后查看动态
题目内容
Each digit of a 20-digit number is either a 1, 2, 3, 4, or 5. If the average (arithmetic mean) of 15 of the 20 digits of the number is 2.8 and if M is the average of all 20 digits of the number, then M must satisfy which of the following inequalities?
D显示答案
以上解析由 考满分老师提供。
