stagqub 当前离线
CFA New Member
我的算法; (40/200)*(70/200)+(100/200)*(130/200) = 0.395 大家切磋一下。本人离开学校有一段时间了。
TOP
just try
P(A or B) = P(A)+P(B)-P(A and B)=0.85
so m010915's answer seems to be incorrect.
I prefer the last answer "none of the above".
[此贴子已经被作者于2006-7-4 2:36:55编辑过]