ChaseDream
搜索
返回列表 发新帖
查看: 2416|回复: 0

[数学] 求问2到数学

[复制链接]
发表于 2020-4-29 21:46:02 | 显示全部楼层 |阅读模式
1. Pick two numbers from set 1 and set 2 separately, set 1 {1,2,3,4}, set 2 {4,1,7,8}, what is the probability of getting at least one 4 in the choice ?
答案是7/16


2. C D = 6 , p o i n t A l i e s o n l i n e C D , p o i n t B i s n o t o n l i n e C D , w h e r e 1 A B < 2 , w h a t s
the range of area of triangle BCD ?


[img]blob:https://forum.chasedream.com/9c2e23a3-50ce-4c3f-929b-35e7b1ce1099[/img]

答案是:6

请指教~~谢谢




您需要登录后才可以回帖 登录 | 立即注册

Mark一下! 看一下! 顶楼主! 感谢分享! 快速回复:

手机版|ChaseDream|GMT+8, 2024-3-29 05:35
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号

ChaseDream 论坛

© 2003-2023 ChaseDream.com. All Rights Reserved.

返回顶部