please help with the following

Probability_assignment_4_sen x Prob lecture 4 prac sheet (2).p X + C D a canvas.Ims.unimelb.edu.au/courses/92400/assignments/213757 GA ... Apps UniLodge D2, Mel... Atira La Trobe Str... Urbanest Melbour.. UniLodge on Lons... Urbanest Swansto... VitalSource Books... Can You Save Any... Used tetra pak Ice... Google Drive Minimize File Preview Media Gallery THE UNIVERSITY OF Page 2 of 2 - ZOOM + MELBOURNE My Media Office 365 1. A company produces 1000 refrigerators in a week at three plants. Plant A produces Account Lecture Capture 350 refrigerators, plant B produces 250 refrigerators and plant C produces 400 refrig- erators. Production records indicate that 5% of the refrigerators produced at plant Gradescope A will be defective, 3% of the refrigerators produced at plant B will be defective and Dashboard 7% of the refrigerators produced at plant C will be defective. All the refrigerators Readings Online are shipped to a central warehouse. If a refrigerator at the warehouse is found to be defective, what is the probability Subjects that it was produced at plant A? 3 marks 2. Box 1 contains four black stones and Box 2 contains two black stones and two white stones. A box is chosen randomly and one stone is drawn randomly from it. Calendar Each box is equally likely to be chosen, as is each stone. Inbox History ? LMS support (a) What is the probability that the randomly drawn stone is black? Communities (2 marks) (b) A draw is made and the box from which the stone is drawn is not observed, but the stone that is drawn is seen to be black. Given this information, what is the Library probability that this stone was drawn from Box 1? (3 marks) Study skills K