Re: Statistics

[Dung Trong Nguyen <nguyen@jaist.ac.jp>]

Dang Hung Thang <thang@mathematik.uni-Bremen.de> wrote:

> Ba tu` nha^n A,B va` C co' tha`nh ti'ch ca?i ta.o nhu+
> nhau. Ho. du+o+c bie^'t nha^n nga`y Quo^'c kha'ch co' 2 ngu+o+`i se~
> ddu+o+.c th?a. A nghi~ ra(`ng nhu+ va^.y xa'c sua^'t dde^? mi`nh
> ddu+o+.c tha? la` 2/3.  A ho?i do` mo^.t ngu+o+`i o+? to`a a'n xin
> cho bie^'t te^n cu?a mo^.t ngu+o+`i ddu+o.c tha? kha'c A ( A kho^ng
> da'm ho?i tha(?ng ve^` mi`nh).Ngu+o+`i ddo' tra? lo+`i la` B
> ddu+o+.c tha?. A hoa?ng qua' vi` ba^y gio+` XS ddu+o+. tha? cu?a
> mi`nh chi? co`n 1/2.  Va^.y XS ddu+o+c tha? cua? A la` bao nhie^u?

Thu+a tha^`y va^~n la` 2/3 tho^i a !