最新提问
我的动态
登录后查看动态
题目内容
A team of two students from an art school is to be selected to represent the school at a national event. The two students will be selected from the students in three classes that have no students in common. The three classes have 10 students, 8 students, and 7 students. If the two students must be selected from different classes, how many teams are possible?
206 显示答案
· 相关考点
6.3.1 计数原理
6.3.1 计数原理
以上解析由 考满分老师提供。