سااعدوني :( سوال ف الاحصاء !!!!!

[arwaaa]

احد يفهمني بليززز :(
6. A person owns a collection of 25 movies, five of which are English. If four movies
are selected at random, find the probability that three of them are English.

[Dr.lamyaa]

5c3*20c1/25c4
.....

[رنين الذهب]

اروى حليته لك في هنا اسئله الاحصاء الي كنا فيه البارح
http://www.skaau.com/vb/showthread.php?t=502559&page=16