Problem Solving
试题详情
题目：
A photographer will arrange 6 people of 6 different heights for photograph by placing them in two rows of three so that each person in the first row is standing in front of someone in the second row. The heights of the people within each row must increase from left to right, and each person in the second row must be taller than the person standing in front of him or her. How many such arrangements of the 6 people are possible?
选项:
A、5
B、6
C、9
D、24
E、36
答案:
A
提问：
想请问老师 这道题除了枚举法还有什么方法可以做吗
这道题我用的枚举法做对了但感觉枚举法浪费时间 而且万一考试的时候更多数据不就列不过来了吗
（之前的答疑录音也是用枚举法）
评分:
1
浏览:
5458
提问：
A photographer will arrange 6 people of 6 different heights for photograph by placing them in two rows of three so that each person in the first row is standing in front of someone in the second row. The heights of the people within each row must increase from left to right, and each person in the second row must be taller than the person standing in front of him or her. How many such arrangements of the 6 people are possible?
5
6
9
24
36
评分:
0
浏览:
5484
