[بقايا حلمم]

السسسسلام عليكم
يسسسعد مساكم

الله يسسعدكم ابغى حل هالتمارين

نظرية احتمالات 1

•1- Stores A , B and C have 5 , 15 and 20employees and, respectively, 5 , 12and 15 percent of them are respectively women. Resignations are equally likely among all employees, regardless of sex. One woman employee resigns, what is the probability that she works in store C?

•The contents of urns I,II and III are as follows:
•1 white, 2 black and 3 red balls’
•2 white, 1 black and 1 red balls’
•4 white, 5 black and 3 red balls’
•One urn is chosen at random and two balls drawn. They happen to be white and red. Whate is the probability that they come from urns I, II, III?