最新提问
我的动态
登录后查看动态
题目内容
What is the probability of selecting two socks of the same color when selecting two socks out of 5 pairs of different colors of socks (each pair of socks have the same color)?
Give your answer as a fraction.
1 /9显示答案
· 相关考点
6.3.5 特殊排列组合技巧
6.3.5 特殊排列组合技巧
以上解析由 考满分老师提供。